I think the Front-End community just happens to collaborate a lot more than other communities and so the ideas get shared at a faster pace. Yes, it leads to framework churn, but it's mostly because we're learning from each other's ideas. If the other side of the coin is stagnation where people learn the dogma of a framework and not the reason behind it, I'm all for framework churn.

Find something that works for your team and stick with it. No one is making you use the latest framework or library out there.