Tags is useful and great however they are problem that will limit it advantages.
And roam does a better job in managing these tag with filter. Filter is pretty useful and should be a must IMO in any app which has tags and roam research way of having all the tags and remove them in filter list of what is not relevant for you is nice and makes tags a powerfully useful one.
We can integrated into into the search or in connections view with a filter icon which shows up tags. Filters should be Roam like and in addition to that ability to search filter should also be added, so we don’t have to search for the removed tag that is buried in other zillion tags.
Example in image