Why aren't mailing list archives mainstream?

It's not just about accountability or corporate transparency, it's about a record of work done!

If law enforcement needs to view emails of employees. I wonder how it works currently.

Example of some OSS email archives: https://lkml.org/

Do you use Email archives in your workplace? Comment below please! ... https://www.youtube.com/watch?v=whogcE6bJ2o