Agreed. I think an underappreciated aspect of choosing a script VM in the space Roblox is in (user-generated content where scripts are content) your product is at the mercy of whoever controls your scripting implementation.

The scripting engine is an integral part of your product, and you need to "own" it end-to-end. Any bugs that creep into new versions of your scripting engine, any API breakage or design changes that impact your usecase are things that you are responsible for. Roblox owns the entire toolchain for Luau, and it's relatively small compared to the set of libraries required to compile to and execute WASM in a performant way.

The nuances of your typical JITing WASM runtime or V8 are pretty hard to learn compared to a simpler VM like Luau, it's a big reason why I've used Luau in my own projects.