Sorry my bad I forgot that you need to set up in startup mode,in optimus-manager-qt you can do it,just select it to nvidia.
I disagree,the driver just work as you saw with prime-run,this is the new default that should have had in the first place,Windows has it since a decade a Linux just had it recently in 3 months or so,it allows the NVIDIA gpu to turn it off and only turn it on when its necessary,it doesn’t need to be fully powered on all the time,imagine using in battery and because the NVIDIA is on your battery life will be poor like 1 hour just browsing the internet.
Also the Linux drivers that detect the NVIDIA card automatically is a recently new feature,sure OpenGL still doesn’t detect it but nowadays everything relies on Vulkan,even Zink drivers that converts OpenGL to Vulkan will be the future (or I hope at least),Windows also detect the NVIDIA card automatically with Vulkan and DirectX,not sure about OpenGL.
There is some exceptional cases where optimus-manager still comes in handy like when the HDMI external only output is laggy unless you switch to NVIDIA mode,just time will tell if NVIDIA fix the issue.
As for the Nouvau drivers well I don’t know,I not too concerned about that,by the time NVIDIA drop support for my 1050 Ti I’ll be buying a new laptop,if i’m too concerned I can just buy a AMD graphic card and use the open source mesa drivers so I don’t have to relie on some company.