I've been running almost exclusively with Edge Dev for several months and (odd hiccup aside) it's been fantastic, especially as I have multiple identities across multiple Office365 tenants.
What would make it even better would be if there was a way I could group these Edge Profiles so that connecting my 'Primary' profile pulls in the connected profiles. Any other devices that I then sign in to with that primary profile would then pull down the other connected profiles, making mutli device working even simpler.
Microsoft Office does this. If I log in with my primary account I have access to my other connected accounts OneDrive & SharePoint sites.