No idea. lemmy.world is a good choice at this point because it still allows signups and the admin Ruud seems to know what he's doing. I remember him mentioning in a post that the current hardware might support up to 1 million users.
Also r/SriLanka mods know about this group because I informed them and they replied. To me personally, Reddit is dead and here's where I'll be sending my time.
Also if you are an ex-Redditor looking for a good mobile app, I recommend wefwef.