Whilst there are no plans for a Rust 2.0, there is an interesting list of desirable breaking changes:
miniblog.
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GitHub has made a considerable effort to let users hide their email addresses: https://help.github.com/articles/about-commit-email-addresses/
I totally understand that users find this desirable, but it's awkward to implement on top of git. GH provide a hook to prevent mistakes: https://help.github.com/articles/blocking-command-line-pushes-that-expose-your-personal-email-address/
YouTube is giving uploaders new ways to monetise their content, including selling merchandise: https://techcrunch.com/2018/06/21/youtube-introduces-channel-memberships-merchandise-and-premieres/
It's largely competing with Twitch (which makes tipping easy and desirable) but also the wider ecosystem of vlogger monetisation services.

