Hi,
Jmix documentation has a What’s new section that is quite usefull. But if you want to take a peek at the next release you will get all confused because the page is basically the same as the one from the current release (release notes appear to be written just prior to release).
It may be a good practice to remove all from whats-new on the development branch to avoid any confusion leaving a note like “this is the version currently in-development, what’s new will be written up just prior to release”