There’s no reason to think that would happen - files you had from ten years ago would have been backed up ten years ago and would be skipped over today.

Good point (I’m assuming you’re right here and it trusts file metadata and doesn’t read files it’s already backed up?)

It would still happen with the first backup - or first connection of the cloud drive - though, which isn’t a great post-setup new user experience. It probably drove complaints and cancellations.

I feel like I’ve accidentally started defending the concept of not backing up these folders, which I didn’t really intend to. I’d also want these backed up. I’m just thinking out loud about the reasons the decision was made.