I don't recall it being a big deal after the black hardware and their DSPs were killed.
"NeXT had its own 3D facilities as well (OpenGL under NeXTSTEP, and Display Renderman), which were entirely tossed out in favor of the "legacy" OS 9 version."
I don't recall NeXT ever having OpenGL. And Display Renderman pretty much lost to OpenGL in the 90s, so that wasn't about to be resurrected.
" NeXTSTEP, or more properly OpenStep, had a Java port from Sun"
Really? I don't remember that.