Project Sharing & Version Compatibility

Hey guys,
How would one go about collaborating with Cubase owners of different versions? Is it even possible? I remember losing forward compatibility on my project files as I’ve updated over the years. Also, I’ve seen this chart, but to me, it merely states which platforms can open which files and doesn’t deal with saving said files on later versions.

Thanks in advance.

Exchange wav’s and MIDI files.

So Steiny isn’t going to make it easy for us, huh? Thanks for the reply.