About bloody time. Containers are fine for on the fly use - for checking what pages look like logged out, or visiting a link that you don't want affecting algorithms etc. but for separating personal and work and whatever else, profiles are the way to go. It's actually already pretty easy to add 'about:profiles' to the toolbar but the more accessible they make it, the better.

I look forward to profiles also making it to the Android app 5 to 10 years from now.