Roon still stomps on all of the other solutions when it comes to native format, multi-room playback with phone/table remote control. It integrates the hi-res streaming partners wonderfully. Plexamp continues to improve, enough so that I've become less inclined to eat the cost of Roon.
I already pay for Plex on the video side of things.
I've slowly stopped caring about multi-room playback, at least as it relates to my local library. I still use Spotify a lot for music discovery and casual listening, with my local library growing as find keepers. Roon still doesn't integrate Spotify, and I pay for Spotify family so my wife and kids can do their own thing. Plexamp doesn't natively play DSD files, but it transcodes to PCM without issue. These days, that's becoming good enough for my ears. The phone/tablet remote control is fussy, but good enough for my shrinking needs.