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If you’re concerned about power draw, then fair enough. The AMD Rome/Milan based chips are very thirsty. Although they can all be set with a fixed cTDP value in watts which they stick to rigidly...
Consumer Ryzen entails a compromise with multiple devices, including any Thunderbolt controllers, secondary M.2 slot, USB controllers etc all hanging off the chipset which is connected to the CPU with a grand total of 4x Gen4 lanes in the case of X570. It all has to flow through this narrow pipe.
But it seems like you’re sure that your use case won’t be hobbled much by this, and single-core boost performance on the consumer Ryzens is appreciably higher.
A mitigating method is using an X570 motherboard that allows bifurcating the Gen4 16-lane GPU slot into 2x Gen4 8-lane slots, such as the ASUS WS X570 Ace. This particular board also uniquely exposes a third full bandwidth 8-lane Gen3 slot connected via the chipset’s 4-lane Gen4 link.
I’ve built several media servers using this board with a GPU, 8-channel capture card, a 25Gb NIC and a Gen4 NVME drive all running on a single consumer Ryzen platform with nothing oversubscribed.
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ectoplasmosis
Velocio
Even a i9-12900K only had 20 PCIe lanes.
Threadripper and Xeon both may improve that but the power draw, high tdp... It's not worth it. And so many apps remain single core and the 5950x or i9 would be higher performance in single core, single thread things.
I've had a dual Xeon system in the past... It was great, but nowhere near as capable at mixed use.
The 5950x with some other bits is the right fit for what I truly do. But now I know to balance what's in it according to PCIe lanes.
Might look at the i9 tomorrow though... PCIe5 and DDR5 could be a reason to wait a couple of months. Will check tomorrow