I really wish I had messed with Windows Phone when it was a thing. They were the only ones not to just ship a clone of an existing interface ASAP. But it was closed source and offered no advantages for carriers or device makers compared to Android.

WebOS needed WASM and a lot more to be successful. I think WASM/WASI is to the point that the next major platform build out can use it.

webOS was a bit ahead of its time - it does live on in LG TV's where its done quite well.