I think gameplay is fine if you are playing the right game
I loved playing Lotus II but there is nothing wrong with Outrun II and I loved playing Wings and Blazing Angels is amazing too.
Anyway....I still have working VIC20s and C64s let alone Amigas so should be ok to have some left over to leave in my will haha
It's hard to say when you will no longer have an Amiga section on ebay which would surely mark the final years of Amigas no? Home computers have only been around maybe a decade before the Amiga and people still remember the VIC20/ZX81 and the Atari 2600 really so it will be a long time, especially with UAE around