I don't see a way of committing to use this service without also maintaining the capability required to operate as you are now on a moments notice. The SLAs won't be cheap either I imagine.

Don't get me wrong though, I think it's a cool service and I can see it going places. It just seems impossible to justify for small to medium sized shops, especially considering you can get the exact same benefits from containers and images right now (and even run your own centralised VSCode server).