I'm one of the alpha testers, but far, far from being a power user. I agree completely with Rajiv's statements -- correct handling of metadata is critical for any music player. Along with correct display of artist, album, genre, etc any sort of competent/accurate search function is going to depend in large measure on finding and correctly dealing with metadata. I am one of those users "who exist" who haven't used folder view to select music to play -- I much prefer album artist, artist (there is a difference!), album or even "last added" and "random selection" to play music in my library or from streaming services.
Roon does this pretty well, though in fairness they've had five or six years to get it more or less right (they still have problems) and many more resources to apply to the problem. Again, Rajiv very correctly points out that XDMS or any but the most basic player has to deal with metadata as it finds it.
To this point, it is indeed very important that users groom their metadata and make it as complete and accurate as possible. I'm guilty of paying a lot less attention to this in the early years of accumulating digital rips and downloads, and I've been playing catch-up ever since. David's method of never putting anything on his server that hasn't been tagged to his liking is a good one. I've adopted this several years ago, and as I find a problem with older music I try to go back and correct problems, errors or omissions on the spot.
At some point it would be good if the Taiko team along with the alpha testers come up with a list of "mandatory" metadata tags that need to be present so XDMS can perform its core tasks correctly (display, sort, search) along with known issues (one such is file names > 256 characters, as an example).
The optimum XDMS experience is going to depend in large part not only on the player software but also on the user giving it a well-tagged library to work with.
The sound quality though is definitely here however, even without all the bells and whistles (yet).
Steve Z