I think that the messaging around this is going to be pretty important in heading off gut-reaction "it's all or nothing locked in to their world" first takes. It's probably attractive marketing for things to be aimed at "look how easy it easy to use our entire ecosystem", but there's a risk to that too.
An interesting thought experiment would be a language/toolchain that would be permissive when generating debug builds, but hard-required warn-free to generate an optimized executable.