Main reason is that it requires a lot of manual work (my time is limited so I have to choose my battles). I did check it initially and didn’t feel like doing all that work to make it run, I did get HBAO+ from that same VXGI branch tho. In addition, VGXI2 is not a priority for me as it’s + only tech so it can’t really be used practically in real projects, more like for proof of concept things or isolated demos. VXGI 1 could technically be run on AMD hw and older Nvidias (even when it didn’t run that good on them) so that was more appealing tech in by opinion.