"I don't own it, I didn't write it, and I don't understand it even slightly. I just made a one-line bug fix for one function in it a year ago and nobody has touched it since, so my name is on top of the git history."
"Cool, so as the owner could you tell me..."
You might actually get in trouble picking up stuff that is not a priority.
Company I work for is less strict so we do “fix anything Friday”.
But for some other companies you might get a slap on the wrist for not following the plan and product owners pick what gets fixed and what not based on business plan. If there are big customers nagging - bug will be fixed asap.
I would not want to be a public maintainer though. I don’t have the patience or motivation to use my spare time for that.