Maybe emails shouldn't be primary documentation. They were never designed for that, and shoehorning them into that role has ruined the entire experience.
For example, my workplace no longer allows forwarding or IMAP access because of this, so I'm forced to use the sh*tty Outlook web client, which wastes untold numbers of minutes each day waiting on the damn thing to load something. Just now it wouldn't let me open a PDF in a native client, because I guess Microsoft is so obsessed with locking us into their ecosystem. Instead I had to save it to disk first then go to the file manager to load it. (Yo, MSFT, this is why people hate you.)