Old comment but I don't get the "nice to have" (granted, very old comment) part:
https://forum.vivaldi.net/topic/102460/assign-profile-to-workspaceIt's a feature that anyone who is employed by any company would appreciate, as often this means having e.g., two Google identities to manage. It's one of my main distractions that I need two independent browser windows to have two profiles (in any browser).
I think it would be a trans-formative because it would turn a power user feature into a mainstream feature. Right now I don't need workspaces for anything but if I could use them to organize my profiles into workspaces they would be a core part of my workflow..
Given that people are right now looking for options, and want data sovereignty, I'd rethink task prioritization; and especially I would think how to provide both sovereignty and killer features that make sense for the majority of the potential user base.
You should really think this through again :-)
@Vivaldi