Sysadmins would say that developers could learn a lot from them. Like, documentation, maintaining backwards compatibility, sane upgrade processes ...

Don't throw stones in glass houses and all that. We all could stand to learn things from other people.

Sure, sysadmins could stand to be better programmers, but software developers tend to forget that software is just a tool, and sysadmins use it like a tool. They just want to get in, get out, and move on to the next problem, so for them, certain best practices in software development aren't all that attractive.