I quite fancy the idea of programming a game for the BBC micro. I've learned so much since those days, it'd be fun to see what could be done with such a limited machine.
However, I'd want a modern text editor and git. I wouldn't want to go back to using cassette tapes or even 80KB or whatever they were disks.
I guess that probably means using an emulator, at least for the development part. With the odd check that it does work on a real machine.
There's probably a web site about this...