Yep, this is my number 1 "I wish I'd read this X years ago" book.

I'm someone who has been doing this stuff for almost two decades without really knowing this is what I'm doing. I used to think what I was going to do was systems level programming like operating systems and maybe the database systems themselves (e.g. postgres, datomic etc.). But for whatever reason my entire career (so far, but I don't see it changing) has been building data systems for businesses and users.

I read the book from cover to cover and half of it was like "ohh... that's how that works, that's what I'm doing wrong" and the other half was "shit, this is something I kinda knew after trying and failing for years, and someone has just written it down in a way I never could".