32bit ARMv7 is arguably better supported these days. Plenty of people still use smartphones with this arch, and software is widely available (you didn't say it had to be x86!).

I can't recall my last 'real' i386 processor, I switched as soon as possible to one of the first AMDs to support 64 bit. I wonder, which 32bit x86 computer do you use which is still working? It must be old, at least a decade. Last Intel made 32bit, there were a few 32bit atom notebooks about a decade ago, but I recall these were rather weak even at the time?