Isn't it annoying to have to change out window handles manually all the time? Or did that just become muscle memory after using the concept for that long?
But every once in a while I spawn them all across the code to hunt some bug, and then I think I got it, and I do the victorious "Aha!" and close the window. And, of course, it's not it and then yes it gets annoying to update the handlers.
$ eval $(start_counters); # start process, print 'COUNTERS_ID=...'
$ ./myapp
I'm suspecting you already thought of this sort of trick and rejected it as not worth the extra complication for the rare annoyance, but since it didn't pop into my head until hours after originally reading this comment I figure it was worth noting just in case.