There seems to be some real interest in this feature in the community. You have suggested I post this in the "Ideas" discussion, so here it is.
It is very commonplace for executives to have different personas across different organizations. For example, I have 3 separate Hubspot accounts, for 3 separate companies. In each company, I have a different email address. Why can't I simply switch between them?
You currently allow people to switch between Hubspot accounts, provided that they have the same email address in both accounts - this does not make much sense.
It seems you are so close to solving this problem - you're just missing the critical last step.
What is the likelihood of this happening soon?