I'm only 35, but it's obvious there's a lot of work to do to "master" a particular language, or at least paradigm. At the point where you feel you've mastered something, or you've reached the point of diminishing returns? Move to a slightly different paradigm, re-apply your accrued knowledge, learn new things, and grow more.
Yes, the field can be insular, yes, there's benefit from cross-pollination from other disciplines, but the field is vast, and it's reach is still expanding. There are plenty of people immigrating and emigrating from CS that are sharing ideas, you don't have to be one if you don't want to be. If you're happy with what you do, and you can make a living doing it, enjoy it. It's privilege, not a curse.
Yes, the field can be insular, yes, there's benefit from cross-pollination from other disciplines, but the field is vast, and it's reach is still expanding. There are plenty of people immigrating and emigrating from CS that are sharing ideas, you don't have to be one if you don't want to be. If you're happy with what you do, and you can make a living doing it, enjoy it. It's privilege, not a curse.