Thanks for sharing, I might have too much NIH syndrome to use it but I'd love to check it out.

True, but I think there's another dimension implied: how many devs are left that understand the code? Being able to start at zero is a fascinating surprise (compared to five years ago).

And yet we are surrounded by cameras that do this constantly

It's the repainting that bothers me

Well whatever the zero means, it can't be the number of days that the bug has been present, generally. It should be expected that most zero-days concern a bug with a non-zero previous lifespan.