Roon's original priority was match against it's meta data source to get all that extra rich meta data. That was priority number 1, and user tagging was an afterthought. Over the last couple years Roon has been reworking things to allow more user specific tagging as they find many users are meticulously tagging their music. I assume some major changes needed to be made to the local database to accommodate this.
It's getting better.
It's getting better.
Roon->HQPlayer->McIntosh C47->McIntosh MC301s>Transparent Super->Wilson Audio Sabrinas w/ Shunyata Denali, Rega RP8, Rega Apheta 2