The Nvidia driver started supporting proper optimus at the begining of 2020 (can runs apps on integrated and dedicated cards simultaneously). I use it regularly

The Nvidia driver started supporting proper optimus at the begining of 2020 (can runs apps on integrated and dedicated cards simultaneously). I use it regularly on my XPS 15 (to play Kerbal Space Program). It's called "DRI PRIME". You have to set an environment variable for starting and application saying what GPU you want it to run on. I am, however, very much looking forward to the new AMD GPUs. Hopefully the RX 6000 series will be near a 3080 in more than the 3 hand picked games in their teaser. Would love to use Wayland on my desktop.