For those who don't need quite that much power I recently added an Orange Pi 5 to my own homelab, the RK3588 SoC packs an impressive punch for what it is
However I’m not sure of any of the rk3588 vendors that support both UEFI and have a full-size PCIe slot like the MS-R1 has.
8 Cortex-A720 vs. 4 Cortex-A76 means at least 3 times better performance for optimized programs.
Also for I/O throughput, this computer has far more fast PCIe lanes than RK3588, allowing many fast peripherals.