I really like the idea of container tabs and I want it to work. I prefer to have certain sites quarantined and the ability to have multiple logins on the same website. The ergonomics of getting that to work are what bothers me. e.g. setting a site to always open in a container tab will still prompt the user if that's what they want. There's also some issues involved in using Oauth2 across containers.

I thought at first I would use this to contain my work related activities and keep them away from everything else, but I now know that separate profiles is the answer to this use case.

All in all I think this is a valuable feature and I look forward to it getting improved upon in the future.