Imagine that we could exchange this presets between users...
Luckily in ArchiCAD most grass presets are stored with material definitions so I could use it in other projects.
HP Z620 Win 10 64+
MBPro Retina 15" (2016), Intel Core i7 2.9 GHz, Radeon Pro 460 4GB, macOS Sierra
ArchiCAD 21 INT/POL, Maxwell Render 3.2/4
It is already possible with the sketchup plugin... and copy/paste in studio is also there, so it shouldn't be so difficult to implement an export for all apps.