Chiming in with my experience on RC4 (5.15.30-Unraid), so far.
- 12th Gen Intel(R) Core(TM) i7-12700K
- 64GB DDR4-3200
- AsRock Z690 Pro RS
- Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller (rev 05)
-- Kernel driver in use: r8169
- Fan speed and temperature sensors working with nct6798
Lots of dockers, zero VMs. Disabled hardware encoding for Plex in the app's settings, but still passing through a /dev/dri device, so I can turn it back on easily when it's ready. I can't confirm the Realtek LAN at 2.5GbE, as I'm using a 10GbE PCIe card instead.
I have not experienced a single crash/freeze.