Hmmm - what do you mean by 'regular computing'?
Gaming?
Surfing and writing e-mails?
Or what?
For me 'regular computing' is e.g. using productive software like 3d-CAD (e.g. DynaCadd; mech. engineering), CNC, rendering of 3d photorealistic scenes and animating them (e.g. Maxon Cinema 4d), robotics and the like...
And as far as I'm aware, most of them require FPUs or at least gain massively from using an FPU...
Yes, regular computing would be emails, word processing, listening to music, watching videos, light photo editing etc. 3D rendering and engineering software are exactly the type of niche software that benefits from an FPU. But that's not "regular computing". Maybe it is for you, but not for most computer users and certainly not for the target market of the A1222. Surely you realize that?
Although if there's enough demand for it, I guess the software could be re-compiled for the A1222 FPU...It does have one.
The X5000 would also be a poor choice for 3D rendering etc., especially under AmigaOS as it doesn't support SMT. You'd get maybe 20-30x the performance from a $400 8-core x86 CPU running Linux or Windows. Even more if the tasks could be accelerated by a GPU. If you're a professional, you know time is money. More projects completed in a shorter time means you earn more...