This. I'm similar to OP (but I've got ~30 years of 'smaller' work/experience under my belt). I've never had problems picking up on a new language or framework;

This. I'm similar to OP (but I've got ~30 years of 'smaller' work/experience under my belt). I've never had problems picking up on a new language or framework; if you understand the underlying fundamentals, it's easier to pick things up.