The speed here is concerning to me. This is way short of what I'd expect or hope for. I hope in the future reviewers start testing this sort of thing when doing in depth reviews; this should be very visible high pressure an objective.

Hopefully there's wins available & this isn't some silly unadvertised hardware gotcha. Higher mtu, trying some parallelism are two good suggestions I heard.

One other thing I'd note: it's only been very recently that Linux has learned how to let the USB and DisplayPort negotiate/allocate bandwidth. It was evenly split between the two until March. Linux 6.3 Adds Thunderbolt/USB4 DisplayPort Bandwidth Allocation Mode. Linux 6.3 Adds Thunderbolt/USB4 DisplayPort Bandwidth Allocation Mode

It's unclear how automatic this bandwidth management is under what systems; users might need to use the new thunderbolt-utils from July to adjust it manually. Intel Rolls Out thunderbolt-utils To Manage USB4/Thunderbolt Devices On Linux. https://www.phoronix.com/news/Intel-Linux-thunderbolt-utils

I really want to hope much better is already possible. I don't own any USB4 systems though! How awesome they are. I hope we see some cool all-in-one's with multiple USB4 in; upcoming Minisforum V3 tablet for example has at least one usb4 that can do DisplayPort In, if I understand, for example, and that capability feels like it should just be coming for free now on PC's USB4 ports!!!