Additionally, this 'fatigue' with front-end is getting a bit over told, I suspect it might be more alienation from developers who hacked jquery scripts together and feel they need to transition to app frameworks (I see so many simple websites and landing pages as react etc now).. where as those sites should just transition to vanilla js + dom..
The thing about inspired frameworks and 'churn' isn't a javascript/front-end thing, it happens everywhere, constantly... how many IOC, DI, ORM frameworks did Java and .NET have..