I remember the announcement for Orion but I haven't followed closely at all - any support for container proxies like in Firefox? Can't lose that feature
Arc, another Webkit-based browser, has an interesting implementation combining Profiles and Arc Spaces[2]. Instead of switching between windows, you switch between "Spaces" in the sidebar that are linked to a profile.
[0] https://addons.mozilla.org/firefox/addon/multi-account-conta...
I might consider demoing Orion on Linux even if it doesn't have container tabs, but at this time I wouldn't consider a full switch without that feature.