The ammo/parts thing was more about how without domestic production there room for it to be affected by changes to import laws or sanctions.
Personally I'm not worried about using something that some other group seems to like. I want what's practical and fits my needs. There is a reason ARs are so common today. They're just good and can be built/modified to fit a lot of people or use cases. If I really wanted something different just to be different I'd get something like a vz 58 or some kind of space gat. It's still kinda hard for me to justify the expense for that kind of reason and I have to rein it in a bit as I kinda want all the things.