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.
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.