What's the point of the constant learning if it's going to be obsolete in 5 years?

That's what I can't stand about the cult of "you get to learn so much at FAANG or a startup" -- at some point in life, you need to spend less time learning new things and start applying the things you have learned. I've been drinking from the proverbial water hose for 20 years. It's tiring now. At some point you need to be able to find the permanent things and reject the noise.