Guys have got Dolphin to run on Pi4 with Gentoo64, not sure the fps.
Lakka will work on Pi4
Retropie won't yet.
What were you doing that you needed more than 1GB of swap?once i figured out how to change the swap file to 2gb, the 3B+ became instantly more useful to me. The 3B+ is a good unit
I preferred the 12MHz AMD 286 in my first PCHorrible machine anyway, I would not want to be building one of those.
Buster or USB driver issue?USB DisplayLink 2.0 to VGA used to also be an option though that seems to be broken under Buster.