2600 on the closing of Google+ and related problems of data longevity. http://download.2600.com/mediadownload/www.2600.com/offthehook/mp3files/2019/off_the_hook__20190403-128.mp3
It was problems like this which originally motivated me to start running a server in 2010. I had accounts in many proprietary silos and the Great Recession was hitting and I thought that some of those gratis systems are either going to close or go subscription only. Indeed many of them did a few years later.