Politically it appears to be a fantastic collaboration.
Technically it looks like they have really thought through this hard -- if you look through the post-MVP plans (https://github.com/WebAssembly/design/blob/master/FutureFeat...) there are a lot of exciting ideas there. But it's not just pie-in-the-sky speculation, the amount of detail makes it clear that they have some really top compiler people who are really rigorously exploring the boundaries of what can be accomplished inside the web platform (SIMD, threading, GC integration, tail calls, multiprocess support, etc).
Politically it appears to be a fantastic collaboration.
Technically it looks like they have really thought through this hard -- if you look through the post-MVP plans (https://github.com/WebAssembly/design/blob/master/FutureFeat...) there are a lot of exciting ideas there. But it's not just pie-in-the-sky speculation, the amount of detail makes it clear that they have some really top compiler people who are really rigorously exploring the boundaries of what can be accomplished inside the web platform (SIMD, threading, GC integration, tail calls, multiprocess support, etc).