Enterprise NVMe drives can do sustained writes of 7GB/s no problem. That’s 58Gbps plus overhead.

That’s to a single drive.

If you are a film crew connecting and ingesting multiple raw 8k 120hz video to be edited, this is very useful

As to whether they use USB4 v2 or thunderbolt, I’m not sure it matters. They look pretty similar, but with thunderbolt it’s very easy to know what the interface is capable of. Good luck when something says “USB 4”.

USB-C is just a connector - thunderbolt uses the exact same connector.