Docker is great because you can install something and all the shit it needs is installed and runs in that container. It’s good for a multitude of reasons mine are:

1. No more installing a dependency, tool or library alongside a program that fucks up something else. No more shit breaking because you installed the latest python but some other program breaks if you move beyond 3.10 (and you forgot to use venv I guess).
2. Somewhat a follow on from 1 but this makes for great functionality with self hosting. I can run a couple docker compose/build command and build/rebuild the containers anywhere I need them. I can test a container on a windows computer to see if it does what I want and works as intended and then spin the some container up on my media server, even if it’s a different OS. I have a bunch of them on my home server and it and it’s great being able to just plug in the port number of the other containers they need to talk to, if any, and that’s all. One container breaking doesn’t break everything else.