> a driver could easily be malicious and exfiltrate anything it wanted to anywhere it wanted This is a thing too, but the main problem was what a kernel level

> a driver could easily be malicious and exfiltrate anything it wanted to anywhere it wanted This is a thing too, but the main problem was what a kernel level drivers not only could, but WOULD crash the kernel (ie cause a BSOD) if something goes wrong. And things gone wrong very, very often. People like to bitch about changes in NT6+, but I have seen waaay less BSODs (not related to the botched hardware) after that.