I guess there will be an “M4 testing results” thread similar to the one for M3 to provide feedback?
One thing I’ve noticed so far is that all my charts are empty. Persistence seems to be fine, new values are written to the (mysql) database, but charts don’t show anything.
Only group charts are affected, charts with single items are working ok.
It looks like item labels need to be unique now, even if they are in different groups.