I'm not sure which post that's directed at...? Maybe I missed something, but I don't really see anyone advocating multiple MIDI tracks here - mainly multiple synth outputs. But even if they were, it wouldn't make any difference; you can see and edit multiple tracks in the PRV at the same time.
I'm not directing at anyone in particular... just relating...
I had thought about just that - you can do multiple tracks in PRV - after I posted, unfortunately. Maybe I am mistaken, for me, multiple synth outs are a given, and sticking things in a folder doesn't even register to me as issue.
I've had a few grunts about multi-synth-out mapped drum soloing - but I usually work around it. That's just me - if it's not bad enough, I won't invest more time than the work around.