The MIDI 2.0 spec was released in 2020 and is being adopted but that will take time. Think how long it takes for a new USB generation to be widespread and multiply by 5 (people are not buying a new piano or synthesizer every 3 years like they do with a laptop or other digital device)

Maybe there's a market in retrofitting old synthesizers like the kits available for some pre-MIDI classics ;)

I'm fairly confident that MIDI 2.0 is already dead. I really don't like to say that.

It was designed by a large industrial committee, in secret, with no transparency and no input from other interested parties. The opposite of MIDI 1.0. And it just stinks of it. It is overwrought by a long shot, with many bells and whistles nobody is asking for (there's a very specific, and frankly short, list of critical MIDI failings). It has no reference examples and will be awful to implement and to deploy over various transports. When it came out it went over like a lead balloon: nobody seems to want to implement it.

My Roland FA-08 supports MIDI 2.0 apparently. That's like 8 years old now. Weird that the spec wasn't finished until 2020