I do think the proofs are still rather useful (changed my mind from previously!), and so having proofs required for GaiaHub configuration should still be an option – however, it would have to be implemented as a standard that is at least managed by the browser because it lies within the
profile.json (but could be expanded to be modified/added to by third-party providers, kind of what @friedger was arguing for).
The proofs/interface still exist but the responsibility to add them is moved away from the browser towards the community. Removing them entirely would be moving backwards and would require the GaiaHub config option to be removed as well.