For some solid arguments on why to test, see our earlier blog about the first beta.
The release is targeted for later this month. Help us make Nextcloud 11 rock stable! We’d especially appreciate testing of the upgrade process as we’ve given that a serious overhaul. And like last time, we’d like to note that apps and their compatibility is another area that needs your testing! If you are brave enough to test in production, at least make sure to do a database backup. And report any issues you find here in GitHub.