What is the opinion of Reddit about the
Focusrite Scarlett 18i20 3rd Gen 18×20 USB Audio Interface with 4 XLR Cables and 4 1/4-inch TRS Cables (9 Items)?

For the first 6 disks on consumer platforms, sure, and those have to share bandwidth with USB 3 and thunderbolt.

Also someone using a PCIe soundcard, when you can fit 38 channels on USB2 is in no place to complain about wasted lanes.