"I just wonder how frontend developers keep up with that pace."
Leapfrog.
You learn the newest hotness right now (and hope you're right), evangelize it like a Southern Baptist at a tent revival, ride the wave for a few years until it's obvious the wheels are coming off in one of the three or four predictable ways, then pick up the new, new thing and pretend the past never happened.
It helps to change jobs every nine months or so; otherwise, someone will ask you to do something to that ancient archaic legacy stuff. Nobody wants that.
Leapfrog.
You learn the newest hotness right now (and hope you're right), evangelize it like a Southern Baptist at a tent revival, ride the wave for a few years until it's obvious the wheels are coming off in one of the three or four predictable ways, then pick up the new, new thing and pretend the past never happened.
It helps to change jobs every nine months or so; otherwise, someone will ask you to do something to that ancient archaic legacy stuff. Nobody wants that.