Hey @AdamSocs1 - Here's my understanding of how it works. If you change your NR account email address, you may still log in to the community with your old credentials. HOWEVER, there is no easy way to simply update the email address on your Community account. I have to work some backend migration wizardry. This is due to the limited options we have for SSO setup between New Relic and our community site.
That's been our experience SO FAR, but things change - so let me know if you are seeing something different. AND - do you need me to update something in the community for you?