@Gabz I deleted all my Gmail except for about 100 important ones, and moved my main email address to one hosted by Hover. I am happy with Hover and my new email address, but I can’t realistically delete my Gmail account. That address is the one everybody knows and every company that needs to contact me has. I have started deleting almost all my incoming email though, which feels freeing when compared to holding onto ten gigabytes of mostly junk mail.
@Gabz I created an email address with a different host and started forwarding all my gmail to it and created a rule that would color code anything that came from gmail. Made it easy to see senders that I needed to update/notify with a new address. I waited about 18 months before completely stopping use os the gmail account. I also exported then deleted all the email in my gmail account - I think doing so was pointless because I believe Google keeps a copy regardless. Also, I use email aliases.