Debian backports security updates to most software, including popular server software. Stable also always uses an LTS kernel, which stays supported upstream. So long as you’re using latest Debian Stable (Bookworm as of this writing), run apt update often (in fact, ‘’’unattended-upgrades’’’ is probably not the worst idea in this case) and do common sense security practices like a firewall and (brain is not working), you should be good.
In brief, it’s totally fine to use Debian and in fact one of the best options in my opinion.
AMD unless you’re actually running AI/ML applications that need a GPU. AMD is easier than NVidia on Linux in every way except for ML and video encoding (although I’m on a Polaris card that lost ROCm support [which I’m bitter about] and I think AMD cards have added a few video codecs since). In GPU compute, Nvidia holds a near-dictatorship, one which I don’t necessarily want to engage in. I haven’t ever used an Intel card, but I’ve heard it seems okay. Annecdotally, graphics support is usable but still improving for gaming. Although its AI ecosystem is immature, I think Intel provides special Tensorflow/Torch modules or something, so with a bit of hacking (but likely less than AMD) you might be able to finagle some stuff into running. Where I’ve heard these shine, though, is in video encoding/decoding. I’ve heard of people buying even the cheapest card and having a blast in FFMPEG.
Truth be told, I don’t mess with ML a lot, but Google Colab provides free GPU-accelerated Linux instances with Nvidia cards, so you could probably just go AMD or Intel and get best usability while just doing AI in Colab.