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Git 3.0's upcoming SHA-256 default will be a costly mistake
(blog.gitbutler.com)
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this post was submitted on 02 Oct 2026
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I don't think your Wayland comparison is great. There are already solutions to app isolation that make X a weak link, e.g. Android or Qubes. Whereas there's basically no future where SHA1 in Git is the weakest link.
Also security was only one reason for Wayland.