There are good reasons to run a 32 bit OS on a RiscPC, as well as bad, but people never seem to mention them. It would also be possible (although quite a bit of work) to create a 32 bit OS that can also run 26 bit applications. (In much the same way Windows XP is 32 bit, but can run 16 bit applications, or the way Linux on an AMD64 can run 64 bit or 32 bit binaries.)
Advantages: You get to fix many of the problems that only exist in 26 bit modes (for example, shared libraries suddenly become possible), aids developers in knowing that 26 bit things are a thing of the past, even if a specific user cannot afford to upgrade their hardware, single branch of the OS to develop, instead of two, etc.
Disadvantages: You may have to pay for upgrades to your 26 bit software to make them 32 bit. Also, some software might just be completely unavailable, but most Iyonix and A9 Home users seem to cope anyway.