At this point, there's not much that can be done with NG AOS or AOS like OSes, unless you are a developer. Classic AOS can equally not provide anything useful, however at least it offers retro-gaming through WHDLoad, by using the native chipset.
I don't mean to sound negative, but it's reality.
But you do sound negative, way too negative and you are exaggerating.
You are saying that a classic Amiga can only be used as a pure, retro game-machine, which is simply not true. You remind me of those pc users back in the Amiga-glory days. They were saying exactly the same thing and they still do..
I'm not suggesting that Amigas are up to date computers/OSes but there are plenty of serious things that you can do with them.