As an aside, please don’t make any more major changes to the API behaviour if you can help it for a few months - my users are starting to get ‘Let’s Encrypt’ fatigue, after all it’s supposed to be set it up and forget about it and this (plus the V1> V2 migration) is contributing to more than one person’s high blood pressure (mine at least!).
Yes, people should keep their software up to date, but they don’t.