It’s coming back in the form of DBRE (hi, it’s me), but unfortunately actual core RDBMS knowledge is often lacking. RDBMS administration is legitimately difficult, as they have a million knobs to turn, and a million gotchas that can tank performance if you aren’t careful. I should mention here that this difficulty really only occurs at scale. If your DB has a few million rows, as long as your queries are indexed it’s unlikely that you’ll experience problems. You probably won’t have optimal performance, but it’s likely to be good enough.

Personally, I love it, but also find it frustrating. The amount of times I’ve presented “here’s your problem, here’s how to fix it, sorry it’s gonna suck” only to be told “nah, we’ll just upsize the instance” is far too many.