This is a good documentation for autorandr: https://help.ubuntu.com/community/DynamicMultiMonitor

I am not sure if I just overlooked something, but autorandr doesn't seem to stay in the background and wait for a change but needs to be called manually, is that correct? While saving profiles can be useful if you do that a lot, that task is easily solved by writing the xrandr command used into a shellscript.

x-on-resize looks like a good alternative to xoutputd though. It's probably worth to take a closer look at it and use the one whose code is simpler and easier to read.

Thank you for those links, I actually tried to find something like this before implementing my own solution. I guess I didn't search enough.