> Abstractions don’t remove complexity. They move it to the day you’re on call.

As someone who has been on call a lot, this is only true for bad or incomplete abstractions.

When you are on call (or developing) you can't possibly know everything about the system. You need abstractions to make sense of what is going on, how the system as a whole works, and know which parts to hone in on when things go wrong.

And it is extremely useful to have standard ways of changing configuration for things like timeouts, buffer sizes, etc. in a central place.