Just as a comparison of their near constant and consistent amount of releases, here's what each of them released by year, over the last twenty years, starting with this year and going backwards-
2012:
NM - Flying Colors (debut album), Cover2Cover, Momentum, A Proggy Christmas
RS - Banks Of Eden (The Flower Kings)
SW - Love And Endings (No-Man), Storm Corrosion (debut album), Catalog/Preserve/Amass, Get All You Deserve
2011:
NM - Testimony 2, One More Night In NYC (YMC), Testimony 2 Live In LA, More Never Is Enough (Transatlantic)
RS - The Black Forest (Agents Of Mercy), Tour Kaputt (The Flower Kings)
SW - Welcome To My DNA (Blackfield), Cenotaph (Bass Communion), Grace For Drowning
2010:
NM - Whirld Tour 2010: Live In London (Transatlantic)
RS - Dramarama (Agents Of Mercy), Whirld Tour 2010: Live In London (Transatlantic)
SW - Anesthetize (Porcupine Tree), Atlanta (Porcupine Tree)
2009:
NM - The Whirlwind (Transatlantic), So Many Roads: Live In Europe
RS - The Whirlwind (Transatlantic), The Fading Ghosts Of Twilight (Agents Of Mercy), Kilimanjaro Secret Brew (3rd World Electric),
SW - The Incident (Porcupine Tree), Ilosaarirock (Porcupine Tree), Mixtaped (No-Man), Chiaroscuro (Bass Communion)
2008:
NM - Lifeline, Sola Scriptura & Beyond
RS - Carpe Diem - Live In USA 2006 (The Flower Kings)
SW - Insurgentes, Schoolyard Ghosts (No-Man), We Lost The Skyline (Porcupine Tree), Pacific Codex (Bass Communion), Molotov and Haze (Bass Communion)
2007:
NM - Sola Scriptura, ? Live, Sing It High: A Collection Of Singles
RS - The Sum Of No Evil (The Flower Kings), The Road Back Home (The Flower Kings)
SW - Blackfield II (Blackfield), Fear Of A Blank Planet (Porcupine Tree), Nil Recurring (Porcupine Tree)
2006:
NM - Cover To Cover
RS - Paradox Hotel, Instant Delivery (The Flower Kings)
SW - Rockpalast (Porcupine Tree), Futile EP (Porcupine Tree), Arriving Somewhere... (Porcupine Tree), Loss (Bass Communion)
2005:
NM - ?
RS - Wallstreet Voodoo, Pyramids And Stars (The Tangent), Mindrevolutions (Kaipa), Brimstoned In Europe (Circus Brimstone)
SW - Deadwing, Indicates Void (Bass Communion)
2004:
NM - One, Testimony Live
RS - Adam & Eve (The Flower Kings), BetchaWannaDanceStoopid!!! (The Flower Kings), The World That We Drive Through (The Tangent)
SW - Warszawa (Porcupine Tree), Ghosts on Magnetic Tape (Bass Communion), Blackfield (debut album)
2003:
NM - Testimony, Live In Europe (Transatlantic), , One Night In NYC (YMC)
RS - Keyholder (Kaipa), Meet The Flower Kings (The Flower Kings), The Music That Died Alone (The Tangent), Live In Europe (Transatlantic)
SW - Together We're Stranger (No-Man)
2002:
NM - Snow (Spock's Beard), It's Not Too Late
RS - Notes From The Past (Kaipa), Unfold The Future (The Flower Kings), Live In New York - Official Bootleg (The Flower Kings)
SW - In Absentia (Porcupine Tree)
2001:
NM - Live In America (Transatlantic), Bridge Across Forever (Transatlantic),
RS - Live In America (Transatlantic), Bridge Across Forever (Transatlantic), The Rainmaker (The Flower Kings)
SW - Recordings (Porcupine Tree), Returning Jesus (No-Man), III (Bass Communion)
2000:
NM - SMPT:e (Transatlantic), V (Spock's Beard), Don't Try This At Home (Spock's Beard), There And Here (Spock's Beard), Nick And Neal: Two Separate Gorillas
RS - SMPT:e (Transatlantic), Alive On Planet Earth (The Flower Kings), Space Revolver (The Flower Kings)
SW - Lightbulb Sun (Porcupine Tree), Voyage 34: The Complete Trip (Porcupine Tree)
1999:
NM - Neal Morse (solo debut), Live at the Whisky and NEARfest (Spock's Beard), Day For Night (Spock's Beard)
RS - Flower Power (The Flower Kings)
SW - Stupid Dream (Porcupine Tree), Speak (No-Man), II (Bass Communion), Atmospherics (Bass Communion)
1998:
NM - The Kindness Of Strangers (Spock's Beard)
RS - Hydrophonia, Édition Limitée Québec (The Flower Kings), Scanning The Greenhouse (The Flower Kings)
SW - I (Bass Communion), Metanoia (Porcupine Tree)
1997:
NM - From The Vault (Spock's Beard)
RS - Stardust We Are (The Flower Kings)
SW - Dry Cleaning Ray (No-Man), Coma Divine - Recorded Live in Rome (Porcupine Tree), Insignificance (Porcupine Tree)
1996:
NM - Beware Of Darkness (Spock's Beard), Official Live Bootleg/The Beard is Out There (Spock's Beard)
RS - Retropolis (The Flower Kings)
SW - Signify (Porcupine Tree), Wild Opera (No-Man)
1995:
NM - The Light (Spock's Beard)
RS - Back In The World Of Adventures (The Flower Kings)
SW - The Sky Moves Sideways (Porcupine Tree), Heaven Taste (No-Man), Flowermix (No-Man)
1994:
NM -
RS - The Flower King
SW - Flowermouth (No-Man), Yellow Hedgerow Dreamscape (Porcupine Tree), Spiral Circus Live (Porcupine Tree), Staircase Infinities (Porcupine Tree), Moonloop (Porcupine Tree)
1993:
NM -
RS -
SW - Up The Downstair (Porcupine Tree), Loveblows & Lovecries - A Confession (No-Man)
As you can see, since 1995, each of them have released at least ONE album a year, whether it's a studio recording, a live recording, or even a compilation. Either way, these men are pretty busy and prolific! Looking at these, it's amazing how much stuff they've released, and this isn't including stuff they've just appeared on for some tracks or as a guest!
So my question for THIS post is - which of these years includes your favorites?! Looking above, I'd say my 3 favorite years would be 1996, 2000 and 2002 - each man's release in those years is pretty consistent and great!
-Marc