I wish the Kickstart ROMs and the Amiga OS source would be released as open source.

I did buy a copy, but ..

What’s the UX like winUAE these days?

I remember years ago finding it very confusing, having to choose the specific Amiga, and simulate specific disk loads.

For me, I just wanted to be able to quickly and easily load up and play the old Amiga games I used to love.

Is that possible yet?

You'd probably be better off with the PUAE core under Retroarch, or some other libretro front-end.

Not great, but a bit better than FS-UAE. Amiberry has a much more logical UX, though it's still a bit cluttered.

Agreed. Last time I tried, I spent an hour trying to run Cannon Fodder and failed. I'd love to hear if that's improved.