Hi
Maybe some day Atlassian make little extra to connect old Accounts with new.
I have moved from one company to another and every time i create new account with new company e-mail and all community badges etc will connected with old account.
Maybe some day Atlassian is make thing that at least we can connect Community accounts together into one.
Or alternative e-mail address what does not change so simple and also Atlassian can understand that this person x is still same even if he/she use @malle.ee or @eesti.ee domain.
I think that maybe there could be solution that there is backup e-mail where i can say that this urmo@acme.com is same urmo ho now is urmo@thingy.com.
Probably yes use own account for all Community thing will be best solution. All data under same account.
That can't work, because it would enable you to have access to systems that people might not want you to have. An Atlassian account needs to have a single unique point of access, which Atlassian have chosen to be that single email address.