After many years we can importing tracks from another cubase project. But why we can’t import FX tracks or Group tracks? Instruments in racks?
Yes, that feature is kind of half baked. I really thought they would extend those lost parts in v9.
I use track archives where this works fine - but you must use Instrument tracks, not rack instruments.
Just use Export Selected Tracks and then Import track archive. It keeps routings as well.