> I think of it as having a nice set of 256 “registers”, in the zero page at addresses 0-255.

It becomes a pain making sure the monitor/bios and any programs don't stomp on each others zero page locations though.

Then if you start daydreaming about multitasking you have to worry about shoveling the contents off somewhere else whenever you switch tasks.

The 65816 at least can relocate zero page & the stack but if you're going 16 bit you're better off going M68K