All major browsers have supported it for over eight years. Maybe the problem was between the seat and the keyboard?

https://caniuse.com/mdn-api_crypto_subtle

Maybe 8 years is not much in a career ? Maybe we had to support one of those browsers that did not support it ? Maybe your snarky comment is out of place ? And even to this day it's still significantly slower than Python stdlib according to the tester. So much for "why python not as fast as js, python is slow, blah blah blah".