[ken]

No, I wouldn't. Bruce Lee once said, "I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times." The opportunity cost of learning 25 new technologies is that you miss out on learning any one of them very well.

I've seen lots of companies throw a giant mess of libraries/frameworks/services at a problem, even though nobody working on it really understands any of them, so they resort to solving every problem by googling. If expertise is to be replaced by StackOverflow, what's the point of requiring it?

I don't think I could have a "deep understanding" of more than a handful of these, in a lifetime.