We know you are patiently waiting for this feature. This feature is being implemented in stages. Fast tenant switching is currently in testing both internally and with early customers. We expect to release to the public in the Fall. I’ll post an update once it’s rolling out.
Full multi-tenant, multi-user support will be added after fast tenant switching.
Agreed with comments below. Many uses have multiple businesses or have real need to be logged in to multiple tenants for business reasons. However this is accomplished (multiple concurrent logins, B2B connections), this is a critical feature.