Replying to the original question of whether or not it will ever grow back.
As someone coming back after years of not playing, Toribash is either going to make a comeback or is going to have a similar competitor show up. It has a really cool idea behind it, but there are some problems that make the game really hard to get into. Things like mod selection can be a pretty big problem for new players, and honestly everything they play should be in a box with low gravity (but maybe not mushu). The time it takes to play is also not super great, as you can wait for a pretty long time to end up losing very quickly. There isn't a lot of great solutions to that, and getting into the community can be pretty intimidating, especially if you want to join it through Discord or something.
I think that none of these are problems for long time players, as we have all found ways to cope with it. Toribash is basically the only reason I get work done for astronomy, and the community is pretty nice. A viral social media post could easily get people into the game for long enough that they would get past these barriers, but getting them to that point is hard. I am going to make a TikTok at some point to try to blow the game up, so I just hope that works.