Now that email bankruptcy has reset the inbox, what to do?

I am moving emails into a CSM (that means Client Service Manager) where threads will be kept there for business related conversations.

If a client message comes in the regular email, the goal is to move it into the CSM, then file the email in the email inbox immediately.

How long will this last? Don’t know. I still have emails from the late ’90s on a disk somewhere. I don’t like to throw emails away.