You mean the thing that Opera had in the 90s, and Vivaldi since inception?

I did, once. It didn’t work.

Removed ‘/dev/null’. You wouldn’t believe how many things rely on /dev/null.

The points made in the article are that server admins should have policies regarding privacy and data retention, that users should be aware of this possibility, and that developers should ensure more of the users’ data is encrypted at all times.