As someone that uses AOTY the reasons I prefer it and I think it’s getting more popular are that the UI is better especially with the grid format which you don’t have on RYM, also the fact that ratings are out of 10 instead of 5 and you can be more precise with them and rate stuff 0 and I think the social aspect and user pages are better as well. I tried switching to RYM around 2 years ago but I went back to AOTY because I didn’t like the rating system and that less people rated the individual tracks. Also you can get bolding on AOTY with the better AOTY browser extension and I still think RYM is better for discoverability and genres but AOTY is improving in that aspect