You haven't seen how AWS operates. Their agility is truly something else. Microsoft is trying to shift within their Azure group to be more like AWS, but it's a DNA/company policy/pace of work thing. Can't speak for the other FAANG companies as I don't cover them. If you work for one of the old large companies - IBM, Oracle, SAP, etc. just know that AWS' pace of getting things done and shipped is probably 5-10x (with comparably low retention)