Yes, at Github.
188.8.131.52 to 184.108.40.206: https://github.com/gburton/Responsive-osCommerce/compare/v220.127.116.11...18.104.22.168
22.214.171.124 to 126.96.36.199: https://github.com/gburton/Responsive-osCommerce/compare/188.8.131.52...184.108.40.206
They will be made aware as CE releases use the same update mechanism from v2.3. This means the update procedure is manual for v2.3 based CE releases (the architecture does not support online updates). Automatic updates will first arrive with v3 and v3 based CE releases.
Community Edition maintainers have the ability to push out a release to the website without my intervention. In fact, the website automatically checks Github once every hour to see if a new release has been pushed out at Github and automatically updates the download page and posts a news announcement if one was posted at Github.
This will be addressed when Community Editions are officially announced.
If they want to stay on PHP 5.6 they can with their current installation. If it runs perfectly today, it will run perfectly tomorrow, and there are active developers in the forum that can help when problems arise. If they want to move to another release or platform, they can't stay on PHP 5.6.
There is a lot of excitement when releases are pushed out, however your current installation is not going to burn if you don't upgrade immediately.