Where have all the midsize shaft-drive bikes gone?

Dear MOby,
Greetings. In the late 1970s and early ’80s I was a motorcycle courier. My bike of choice was the Honda CX500. Around that time and through most of the ’80’s there were a lot of mid size motorcycles with shaft drives. I eventually sold it and haven’t ridden since.
I’m retired now and looking to get back into motorcycling and do some touring on a mid-range shaft-drive bike (side road touring, not major motorways) but they don’t seem to exist anymore (except for Moto Guzzi).
So what happened to the mid-range final shaft bikes?
Just curious and if