Your comment made me curious, were there any other features or ideas that you (& team) loved but didn’t have the user base or buy-in to include by default?
In reality, Google search was good enough to find what you wanted 95% of the time, and most people would not bother discovering and learning a separate pathway to find the remaining 5% - especially when combined with our poor human memories and local search capabilities at the time.
That would still be a real innovation over the current 90 day retention maximum.
(And I think the real innovation would be showing the branching, not mangling everything into a linear history. But it's harder to show and use well, so it doesn't happen. Very much the same story as editor undo/redo.)