Funnily enough, I landed up in my own Demos directory the other day, and spent a good few minutes running through the old demos. I remember they messed up a bit with the BASS mega-demo - at certain points they detected processor when they should really have been checking OS version. I remember switching my ARM610 card back in to my 3.7 machine to see if it'd run extra segments. It did, and then they crashed.
Sadly, Zero no longer seems to run on my old 4.02 SA, crashing at a certain point. The other 'ultimate' SA demo, K2, still runs fine on my machine. And I enjoyed re-running Reisnac too the other day.
It's a shame that the scene died after that. DFI's K2 really showed a new flair for design, and little features like, oh, frame rates. And Zero showed real skill at coding for the Nutters lads. Fluro always has the requisite spit and polish, but sometimes it just didn't seem to be trying hard enough.
I don't agree necessarily with 32-bitting old demos though. Granted, it's cool that jojo still runs on SAs, but the real point of jojo is that it'll run on an ARM250 machine. The important thing about those flagship demos is that they push whatever machine they're running on to the limit. But then I prefer running BBC games on the original hardware rather than an emulator, so maybe that's just me.
I did hope at one point that the Iyonix would prompt coders back, but perhaps it having a more conventional graphics card there's less to be gained from pushing it to its limit, when PC demo coders have already been there. Perhaps, I'm not sure.