I've been programming professionally for 12+ years. I haven't had a need to look at CLRS since I took my graduate (!!!) algorithms course in college.

I don't work in FAANG, but I am a senior developer in another industry. It would take me way more than two and a half weeks to work through all of the problem sets in CLRS; two and a half weeks is more for someone who is a year or two out of college. I don't think being able to work through the problems in that book is indicative of a senior developer either...

Anyway, this is why I'll probably end up never changing industries. The barrier to entry is (too) high; especially for those of us who already make comparable money.