good point, hadn't considered that board. I do hope they loosen up, but a high-end server market board is not completely the same thing either.
[0] https://www.tweaktown.com/image.php?image=https://static.twe...
[1] https://www.tweaktown.com/image.php?image=https://static.twe...
[2] https://www.tweaktown.com/image.php?image=https://static.twe...
[3] https://www.tweaktown.com/image.php?image=https://static.twe...
[4] https://www.tweaktown.com/image.php?image=https://static.twe...
[5] https://www.tweaktown.com/image.php?image=https://static.twe...
[6] https://www.supermicro.com/en/products/motherboard/x13sae-f
(please read the reviews of the site whose effort i've leached forever, and it's actual old-school good review content)
https://www.tweaktown.com/reviews/7112/asrock-x99e-itx-ac-mi...
https://www.tweaktown.com/reviews/8404/asrock-x299e-itx-ac-m...
The Asrock Rack series are really really good now and I think both their AM4 and SP3 platforms are really appealing. ROMED8-2T is everything a motherboard should be. Except for SFP+, of course. But Asrock Rack's design teams really have a good pulse on what the prosumer/homelab/soho market wants, they have been pumping out a ton of great designs lately.
https://www.asrockrack.com/general/productdetail.asp?Model=R...
Doesn't seem to be an issue for the X600. You may have seen this review [1]. The AM5D4ID-2T/BCM isn't cheap, but it doesn't have a real chipset either.
[1] https://www.servethehome.com/asrock-rack-am5d4id-2t-bcm-revi...