Yet he's a bigger artist right now than Porcupine Tree ever was,
No, I don't think that's true. For example, on the tour for The Incident, he played The Warfield Theater in San Francisco. Capacity is just under 3,000 people. The last time he played San Francisco, he played The Filmore, which has a capacity of 800.
Interestingly, once he left PT behind, he played The Filmore, worked his way up to playing The Warfield again in 2015 as a solo artist, and then when he last played San Francisco in 2018, he had to downgrade back to The Filmore. So if anything, his popularity as a solo artist is declining.
Musicians and bands change through time, same happens to Steven Wilson. The PT comparisons really are old; he's been off that for 10 years already.
No doubt they all change. Again, if any of his fans take offense at my critiques, it's just opinion. No offense intended. I don't think the comparisons are old though. Porcupine Tree, as much as Steven Wilson tries to distance himself from it (except when the reissues make him money), was a special band. 10 years later or not, people will always compare him to Porcupine Tree, because that's what put him on the map. He owes his success to that band.
As I said earlier, I respect Steven Wilson following his muse. I really do. If he doesn't like guitar-based rock any longer, that's his call, of course. But his snide comments once in a while are stupid, particularly for a guy who no one would know about had it not been for the band he was a mainstay and creative leader in that he shelved so he could, essentially, become a solo artist on the back of their success and have a built-in audience. In a way, he hurt the careers of everyone else in Porcupine Tree -- people who worked just as hard as him to build that band up, particularly once they got signed to a major label.