I use Obsidian with a folder for hardware and a folder for software, then an entry for each device or service. I’ve been pretty good about maintaining cross-links.
I kind of wish I used Docker Compose more, but I haven’t run into a situation where it’s been a problem yet.

But what’s the point of downvoting on Lemmy? It doesn’t seem to affect visibility. Or maybe there’s a setting somewhere I need to adjust?

I run it for my pi-hole. It’s been great. It tells you when there are package updates when you log in, which I find helpful.