Hmm, thanks. So I guess I need to brush up on where cloud-init stores all its stuff. Evidently it’s not limited to the location you pointed out here (/var/lib/cloud/*). I have to admit that at this point it still is somewhat of a mystery to me. But I’ll get there and it seems to be a worthwhile subject for research.
Thanks for your time, Stéphane!
If I don’t forget it, I’ll update this post for the benefit of future visitors with my findings.