BOTH parties want to avoid it sticking around in their email forever. Do folks not work with partners who are sloppy with security? You send over you stuff. No

BOTH parties want to avoid it sticking around in their email forever. Do folks not work with partners who are sloppy with security? You send over you stuff. No one wants to leak it but someone's email is hacked. Do you want your stuff in their email still 5 years later? Do folks not work in business? Bob sends sue draft of updated raises, sue edits and adds some notes and sends them back. A final decision is reached. After some time the big list of salary info by position -> folks want that out of their emails. This would keep it out. This is a REAL security benefit. It goes to show that folks like protonmail and other security experts don't have a good real world understanding of risks to info people face. It's not all state level hacking, it's folks being lazy, not cleaning out their email, then getting hacked.