Just go back to books or other sources of knowledge and restart from scratch. It shouldn't take long to get your thinking back. W.R.T. any large industry crash

Just go back to books or other sources of knowledge and restart from scratch. It shouldn't take long to get your thinking back. W.R.T. any large industry crash, no one's going to care if you can do your Angular (or specific tech skill) stuff in 1 days vs. 5 days, so why the emphasis on speed in this scenario? Both System 1 or 2 thinking is fine here. We've enjoyed some pretty great technical advances for the past 40 years, even with a 10 year "dark age" we're still net ahead. We can rebuild and relearn a lot of stuff in 10 years.