Do any of you have this problem? You move to a new company but want to retain your Community contributions and interactions? Well there's a solution! To save you clicking through to the original post ("originally posted"), I'll copy/paste Phoebe Venkat's (Salesforce) answer here:

"if you leave your company, what we can do is remap your profile. This means we would set it up so that your new user maps to your old one -- this retains all of your Success Community content. If you are interested in this, please create a case so we can help you."