Yeah, for me it has been docker and kubernetes. I have found it to be something of a killer app for spinning up on anything with a bunch of annoying little details, that I'm not already super familiar with.

Make, docker, kubernetes, all fit this pattern. Heck, maybe I won't be so down on autotools if I run into it again now that I can attack it with LLM support.

Or html / css; I haven't written any of that in the LLM era, but maybe I'd enjoy it more now.