For all non-enterprise user this feature is required to be able to find new devices and add it manually to groups.
At the moment, I have to revert back to 2.3.0, because it’s impossible to use it.
Without dynamic groups also for open-source mender server, “ungrouped devices” are the only reasonable way to identify new devices still not added to static groups.
The new filter using a single value to identify newer devices is not enough.