After listening to all seven shows from Progeny, and a number of bootlets over the years, what stands out to me is how different they really are. It may seem counterintuitive, because Yes music is so complex and structured, but there's actually a lot of improvisation built in. Steve Howe's solos and licks are always different. Every song, every time. Wakeman's a little more structured, but he also mixes things up a lot. From what I heard of Rabin's live performances, he is similar. This is most evident in the solo sections, which always feature greatly in live Yes shows.
All that said, I still think 30 discs is insane. Maybe pick four or five of the best shows. Or maybe seven, just so that there's something of a symmetry to the Progeny set. But the buzz on the Yesfans boards is not about what there is, but what is missing. Apparently there are some pretty well-known professionally shot shows from the Union tour, and they're not the ones on the DVDs here. Also... DVD? This is the 21st century. I waited years to upgrade to HD, and it's been over 10 years already, so honestly I'm still surprised when anyone with any interest in audio or video has not gone HD. These should be Blu-rays.
I'd have to think that only the most rabid fans, with a lot of money to spend, would want this, while something a little lower key might sell better. But laying out $300 and not even getting HD turns me off right there.