IMO, we desperately need standards or tooling to make frameworks easier to swap out and interoperate. Web Components was supposed to be this, but it's not quite there yet and requires awkward wrappers around everything.

No framework will stand the test of time. I encourage everyone to, at the very least, own your state and router libraries, as you'll be able to extend them when you want to jump ship in a more incremental fashion. Going all in on a single framework's state, router, and view libraries will create a ton of inertia...