However, the nice thing about MIDI is that it allows me to hook up my 2020/2021 synthesizer (a Behringer 2600) to a 1987 sequencer (a Yamaha QX5), a 2015 synth (a Roland JD-Xi), or pretty much any piece of pro synth gear made since 1983.
Now, with MIDI-over-USB or what not, we lose something which makes MIDI very nice: We can connect a hardware keyboard to a dedicates sound module without having to have a computer involved. While there are USB host synths which one can connect a MIDI-only-over-USB keyboard to directly, they are few and far between (my JD-Xi has USB, as does my 2600 and Arturia Keylab controller, but all three can only be hooked up to a computer with USB)
Until MIDI 2.0 has a way to allow synths to be connected to each other without involving computers, and there is a standard way to do that (I think USB-C would probably be best for this), DIN MIDI 1.0 will be a part of pro and bedroom recording studios.