I just feel zero need to stay current. New frameworks may well be better, but incrementally, not radically. I stay "current" by keeping an eye on HN, and when a name becomes so familiar that it seems entrenched, I'll give it a try on my next greenfield project.
Not everyone can work like that; it's a side effect of the domain I work in. But I chose that in part because I'd rather get work done than chase new things.