In reply to Jon.

I wouldn't say that there's a disconnect, I think it's easy to get the impression that everyone will use the same framework as Core based on comments on the Tavern or in core-js chats, but I don't believe that'll be the case when the wider WordPress world starts building Gutenblocks.

It's also worth noting that, even if you do use the same framework at Gutenberg, you'll still have the same API available as if you used any other framework. Framework-specific functionality is intentionally not being exposed, which gives us the freedom to switch the framework in the future, if need be. Relying on any framework internals is absolutely not recommended, as framework maintainers generally don't maintain backward compatibility with their internals, and we certainly wouldn't be able to in the event of a framework switch.