Many, many years ago, when ~persia came ashore~ dropbox was announced on HN [0] The top comment was quick to point out "For a Linux user, you can already build such a system yourself quite trivially

[0] https://news.ycombinator.com/item?id=8863

I mean a dev tool that's seemingly failing to resonate with developers as to why they would pay for this is a pretty good way to tell if it's going to fall in the 1%.

The Dropbox take was wrong because they didn't understand the market for the product. This time the people commenting are the target audience. You even get the secondary way this product will lose even if turns out to be a good idea, existing git forges won't want to lose users and so will standardize and support attaching metadata to commits.