the most important part of open source is not about security since yes, that still depends on competent people reviewing every change all the time just like any software. the most important part is that once the author has grown tired of maintaining it, or goes off in a direction they want but maybe you dont or dies/goes bankrupt etc... The software doesn't have to die with it or change with them or abandon your needs. You can (or like minded indviduals) fork it and adapt it to your needs. Or keep updating it for new hardware. Bring it to new archs that maybe the original authors dont care about. That's the most important part. The freedom to take the software to places you care about. AMD (and intel) give you that opportunity. Nvidia does not. So as far as I'm concerned, nvidia can release the best hardware ever to grace humanity ...they'll still get a huge middle finger from my wallet.