Another point I haven't seen mentioned much: WASM (in theory, and not including some modern extensions) has perfect, cross-platform, cross-architecture determinism. It's niche but I think it's very interesting.
For example, I've toyed with the idea of creating a game which runs its logic/simulation entirely in WASM with the only input being the controller/keyboard inputs. That way you can create perfectly reproducable replays which could be used for racing games or timed platform games similar to Mario Maker. Then your leaderboard of best times can be properly verified (not accounting for manufactured/edited replays similar to TASs, Tool Assisted Speedruns). You could take it a step further and include previous versions of the game simulation WASM to get backwards replay compatibility, which is also uncommon in games.
For example, I've toyed with the idea of creating a game which runs its logic/simulation entirely in WASM with the only input being the controller/keyboard inputs. That way you can create perfectly reproducable replays which could be used for racing games or timed platform games similar to Mario Maker. Then your leaderboard of best times can be properly verified (not accounting for manufactured/edited replays similar to TASs, Tool Assisted Speedruns). You could take it a step further and include previous versions of the game simulation WASM to get backwards replay compatibility, which is also uncommon in games.