Wasm is used in a lot of nooks and crannies, apart from games, Figma already uses it in the core and Wasm-GC has just started to become viable so we will se a lot of server-side languages get better web support.

Using Wasm as an end-all system was never the main intention even if we're heading that way now thanks to all the work people has put in.

I'd say that it's probably used where it's made sense so far.