On the other end of the spectrum I get occasional updates for a Libre Office bug I filed years ago. They were very open, welcoming, and conscientious.
We do automated calls for re-testing for reports in NEW state (=triaged) that have been untouched for a year. Earlier experiments with thorough re-testing always resulted in 20-25% of the tested reports being closed as WORKSFORME (so either duplicates of fixed issues or otherwise "silently fixed").
Our QA engineer has developed a set of scripts that help him make sure the bug tracker is not a mess: https://gerrit.libreoffice.org/gitweb?p=dev-tools.git;a=tree... https://wiki.documentfoundation.org/QA/Bugzilla/AutomatedTas... Much of this was inspired by our "gardening" effort: https://wiki.documentfoundation.org/QA/Bugzilla/Gardening
Deeper re-triaging of old reports also happens constantly. A couple of months ago I did a bisecting run for about a hundred older and newer bugs.
On the topic: I hope Ubuntu users continue reporting bugs. Upstream projects do benefit from them, I know this for a fact from our own experience.
This may be the exception to the rule but I was really impressed.