I just spent 20 minutes trying to find an article by Bryne Hobart vaguely in this area [0], but for personal messaging. The idea being if you control the storage (or deletion) you can avoid casual or speculative regulatory interest in your chat logs.

(apologies it's on medium, I couldn't find it anywhere else)

[0] https://byrnehobart.medium.com/the-stealth-regulatory-arbitr...