The problem is Roon does not support Rhapsody/Napster & I have loads of music not in Tidal. For this reason I haven't updated to Catalina as Control:Mac still works in Yosemite if your quick, this is because it keeps freezing & needs closing down & reopening but you can get the job done.
I fear if I have Catalina it will be gone.

Control:15, QNAP, DSP5200SE, 818v.3,Panasonic 55" TV, Panasonic bluray player, Stax SR 009 Earspeaker System, , 27" iMac, iPads Mini & Air, iPod touch.