When I moved to Korea 3 years ago then I found r/korea and after a year or something I've been banned from posting and commenting there after my 2nd post because of some technicality (posted a link to my a video on my own peertube instance instead of a 3rd party like YouTube). A later found out there was a r/living-in-korea one which anyway fit much better and I was able to post and comment there.

So in my mind having several is much better than having one.

What would be nice is some UI to group and view them together as a user though.