There seems to have been a little progress on that recently, I saw someone working on a ppc 32bit port here: https://bsd.network/@tobhe/111756322928965195 and I also saw somewhere someone working on a 68000 port, but I don't remember where.
I'd like an arm 32bit port, which might be a bit easier with this ppc port as an example of 32bit qbe. It'd be nice to try run some hare programs on a gameboy advance :)
cproc supports C11, tcc only goes up to c99. There is also something to be said for cproc using QBE which is slowly growing backends like risc-v etc which tcc doesnt support afaik.
If it works on ones computer I dont see why it couldnt be daily driven depending on your needs. It has a webkit based browser, and a native emacs port, thats pretty much all i use day to day :P
I also dont think any tax payer is concerned about the cost of a document being formatted differently.