Every other driver uses GBM, which is well supported by all the various software related to gpu buffer management. Nvidia decided to not use GBM and instead use

Every other driver uses GBM, which is well supported by all the various software related to gpu buffer management. Nvidia decided to not use GBM and instead use this EGLStreams thing, which meant it wasn't compatible. Politically, this was contentious since nvidia was offloading a huge development burden onto the ecosystem to create parallel implementations of buffer management specifically for nvidia. Wlroots ended up deciding this was such an inane thing for nvidia to do, that they refused to implement EGLStreams at all. Eventually, nvidia backpedaled and decided to implement GBM. Now they are just behind, but everything will probably eventually support nvidia.