[MichaelZuo]

> We had mockups that looked like subway maps, implemented floating overlays showing your recent tasks, and we designed the history database to store everything forever.

That would still be a real innovation over the current 90 day retention maximum.

[yencabulator]

Unfortunately, today's version of that is "Web & App Activity", sent to Google servers with the Terms of Service allowing it to be used for ad targeting and what not.

(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.)