All computers have to perform the same tasks and all computers use 'custom' chips (unless they're based on SOCs which is about as 'custom' as you get).
Yeah, Amigas worked well when they were current. Today's computers work even better. What worked well in the '90's isn't necessary these days.
So what's left except the OS?
I like MorphOS and AOS4 'cause they're compact, efficient, and boot quick. Very Amiga-like.