I’m having similar issues.
Roon Core Machine
Mac mini (late 2012), 2.3 GHz Quad-Core Intel Core I7, 16 GB RAM, Mac OS Catalina 10.15.7
Networking Gear & Setup Details
Asus RT-AC88U Router
Mini is connected via ethernet.
Connected Audio Devices
microRendu (ethernet) - feeds Lyngdorf TDAI-2170
Raspberry Pi (ethernet) - Feeds Cary Cinema 12 Processor
Chromecast Audio (4 total wireless) - Feeds Peachtree M40, Peachtree Deep Blue, Cary Cinema 12, and Lyngdorf TDAI-2170
Wiim Mini (wireless) - feeds Lyngdorf TDAI-2170
Number of Tracks in Library
Majority of library via Tidal. I have an assortment of ALAC, FLAC, and even a handful of DSD tracks stored on Drobo connected to the Mac Mini via thunderbolt.
Description of Issue
Roon 2.0 runs very slow and ultimately crashes. It appears there may be a memory leak as the Mac mini reports low resources as Root runs over time. Eventually it crashes and I get a massive crash report that I can share later.