@David “Update Notifier” does not seem to have been updated since 2010-9-20...

My apologies, David; I was afraid something like this might happen. ;)

I'm not on my own platform, and don't have access to my stuff right now. I 'winged it' by searching for the term that sounded like the plugin I use to do this (and which I do see come up in my Admin Updates, 'regularly'). I regret puttin out a possibly weak pointer.

Thanks for pointing that out, for everyone who might read this.

The point does stand, though, that there are nice plugin tools to help keep on top of all our plugin-chores. (These tools become important/essential, for people who collect large numbers of plugins. For those who have only a dozen or 2, it's not hard to keep track 'manually'. With 100s, tho ... one starts searching for tools to help with it.)

And yes ... it is not unusual for abandoned plugins to continue working for long periods. If code is written 'conservatively', is simple and makes few assumptions about WordPress, some plugins will work close to 'forever', without being updated.