Intel-undervolt: CPU undervolting and throttling configuration tool for Linux

It was sad seeing AMDGPU limit undervolting semi-recently. A couple complaints or bits of damage ruined a practice that a lot of people were using just fine to save significsnt wattage, https://www.phoronix.com/news/AMDGPU-Lower-Power-Limit

Not just AMD. I recently bought a nvidia 4060 card and i can't set the power limit lower than something like 75-90 W, at least in Linux.

Of course, it's possible that the lower limit has always been there for nvidia, but I just didn't know because I went without a dedicated video card for like 4 years.

For AMD aren't the drivers (partially) open source? Can't the change be reverted?