Nvidia has been open-sourcing their drivers, but it’s been taking forever.

It’s been taking forever because they’re moving a lot of code into the firmware to keep it closed source. It’s essentially a brand new driver that takes advantage of newer firmware. That’s one of the reasons the open-source driver only works with Turing (2000 series) and newer cards - they don’t want to spend the time updating older firmware to handle the open-source driver.