I am not really sure what DAM is, but guessing it’s digital access management. Not having looked at the other softwares, my experience if limited to darktable. But I do have software engineering background and perhaps that influences my choices.
Couple of years back I thought darktable was not good enough for my needs when it comes to searching for tags or in general. I even created a prototype of what I had in mind and presented it on developers list. They were very polite and nice and pointed me that most of the functionality that I was trying to build exists and pointed me in the right direction. Of course, I never expected my solution in it’s form to be available especially since I was reading the database that only darktable should be reading/managing.
From my needs perspective, only major thing I miss is a tag cloud - not sure if it’s part of DAM, but more like how I view data. I do understand I am a bumbling hobbyist at best when it comes to photography and not a professional whose needs are completely different.