> they want to be able to make breaking language changes

That sounds like it's not ready for production to me.

I invite you to read the release notes and see for yourself the types of breaking changes we’re talking about.

To me it is not much different from Lua, which despite being on 5.x for decades, makes breaking changes on minor releases (because it predates SemVer).

I also don’t see it being much different from any other language or language runtime that has a major release every year.

It’s fine to update at your own pace.