I haven’t tried recently, but that used to be extremely false.
Like, if I made a patch which used nothing but brightness levels 0 and 15, you’d expect that to be 100% backwards compatible. But, it was only 50% backwards compatible. (Specifically, the “brightness at zero” half worked as expected.)
Again, possible that’s changed in the intervening years.
That was with max/msp, mind you.
The modular stuff, I believe Brian programmed support for older grids.
Norns, nobody has.