Linux 6.5 Released With AMD P-State EPP Default, USB4 v2, MIDI 2.0 and More Hardware Bits
phoronix.com
Linux 6.5 has many great features from the AMD P-State EPP driver default rather than ACPI CPUFreq for Zen 2 and newer supported AMD Ryzen systems, initial USB4 v2 enablement, initial MIDI 2.0 kernel driver work, more Intel hybrid CPU tuning, and a whole lot more.
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The v2 part here really just refers to the fact that it's version 2 of the specification. Consumerrs only need to know the term USB4 and the speed that their device operates at. It's sort of like complaining that the ietf has terrible naming schemes because HTTP is defined in half a dozen RFCs with 4 digit numbers. This versioning is just meant for people developing USB things.
Actually this article here is one of the few times where even mentioning the version 2 part is reasonable since the details of these specifications actually matter to kernel developerrs. For everybody else it's just USB4 80 gbps.
That is expecting a lot of the average consumer and is rather unreasonable to do so.
Well you have to differentiate somehow and USB 5, 10, 20, 40 or 80 gbps sound like reasonable terms for normal people.
usb 3.1 gen 1 vs gen 2 vs 3.0 vs 4 vs 4 v2
yes these are the terms that are not supposed to be used in product naming or by consumers and are just intended for use by people developing USB devices.