Cakewalk Sonar Refugee: best way to migrate standard midi projects with as much data as possible?

Hello. I'm the vanguard of what will be at least some migration from Sonar. I've been using Cakewalk/Sonar for just over 20 years aaaand I'm done. Too much drama. The writing was on the wall when "lifetime subscription" cost a mere $99 for us long-timers. "One last bit of cash please."

The wall now has new writing which reads "PreSonus Studio One 3." It also reads, "am I going to have to manually assign all my instruments and everything when I port files over from Sonar to S1.3?"

I'm assuming I need to export my Sonar projects to a Midi1 and then simply import. Is that my best/only option? Is there something that allows a more seamless port between the two, or is it really just MIDI1 ?

Sonar exports MIDI0, MIDI1, RIFF MIDI0, RIFF MIDI1 - I've never seen anything else even use RIFF MIDI x

In any case I'm hoping to be able to export files that won't cause me a lot of headaches. I don't have much of anything with tempo tracks, so that's a non-issue (been reading a bit about that).

And hello.