It's worth noting that Microsoft owns Github, so this is arguably another instance of Microsoft releasing a roadmap

Google also has a limited list of upcoming features for their primary G Suite apps (although there is a NDA'd roadmap for partners as well)

https://support.google.com/a/table/7539891?hl=en

I wonder what the product closure roadmap looks like.

Want that one more as need to plan for some. Any available? Sigh.

Yeah. All Cloud deprecations have a minimum of a year notice, usually as an email, ahead of multiple follow up emails as the year draws close. It's in the terms.

Additionally, you can also get this information in the public release notes https://cloud.google.com/release-notes twice-monthly GCP newsletter, and for G Suite administrators in their news area. "Sigh."