who are legally obliged to record all that unencrypted data They may be compelled to do that. It was actually a European directive, and subsequent regulations

who are legally obliged to record all that unencrypted data They may be compelled to do that. It was actually a European directive, and subsequent regulations in each member state, that forced providers to retain data pre-emptively, and even that didn't require them to record all traffic. https://en.wikipedia.org/wiki/Data_Retention_Directive https://en.wikipedia.org/wiki/Data_Retention_Directive