Scrubbing through some email boxes, I recently ran across a June, 2020 article from Adam Engst of TidBITS (published in the weekly TidBITS newsletter):

https://tidbits.com/2020/06/11/beware-icloud-backups-deleted-after-180-days/

This continues to be relatively unknown to iCloud users of the maintenance protocol of iCloud stored backups, so I encourage you to read the whole article (and the Comments at article end), and share it with your group’s members.

Even Clouds have their limits, right?