Cloud, machine learning, AI. If you haven't gotten your Ph.D. in machine learning by now, you're at considerable risk of being replaced by an offshore dev who can do your job for pennies on the dollar. As for languages, the future of computing is JavaScript (except for the lowest and most performance-sensitive layers, over which the Rust Evangelism Strike Force has an unshakable claim).
Nontechnical skills: practice vipassana and observe a strict, austere hipster diet (preferably plant-based) if you want to not die. Learn how to sustainably live off-grid with zero emissions if you want to not kill the planet. And for God's sake, delete your FANG accounts. All of them.
"As for languages, the future of computing is JavaScript (except for the lowest and most performance-sensitive layers, over which the Rust Evangelism Strike Force has an unshakable claim". You mentioned AI/ML both of which are deeply embedded in Python ecosystem though R is still the choice of academia. JS is and will continue to be a client only Tech stack for ML because of it's lack of a NUMPy like Math library. Between friends you should also add Python to your arsenal of languages to learn.
Nontechnical skills: practice vipassana and observe a strict, austere hipster diet (preferably plant-based) if you want to not die. Learn how to sustainably live off-grid with zero emissions if you want to not kill the planet. And for God's sake, delete your FANG accounts. All of them.