@meersau technically, yes. But I already have 4 gmail accounts. I don't want to create also 4 Opera accounts and use only one of those per gmail account, keeping in mind which I've coupled with. Too complex.
Also, the Opera account does not include a record of the addons installed, only history and bookmarks. So, I could not have let's say one configuration to work and one for my spare time.
That Chromium/Chrome menu is a simple and yet wonderful user experience solution.