I'm not sure I can think of an example beyond lack of software/driver support

General difficulty of use (i.e. how many things do I have to read and do for something to happen the way I want)

And I want libraries to be officially supported, whatever that looks like, mainly so I don't have to use workarounds or unverified sources (I don't want to be using lots of Arch's equivalent of PPAs, for example)

I don't understand your point. How is it good that the developers thought they were faster? Does that imply anything at all in LLMs' favour? IMO that makes the situation worse because we're not only fighting inefficiency, but delusion.

20% slower is substantial. Imagine the effect on the economy if 20% of all output was discarded (or more accurately, spent using electricity).

Mullvad browser fights fingerprinting. You can check how exposed you are here (no idea how good this site is https://coveryourtracks.eff.org/)

how do you know this stuff?!

hmmm, perhaps 2x32GB is overkill ...

i'm getting a 6000/28CL

I'm thinking 2x32GB, tempted by more but seems excessive

I'm going NVME

would a decent air cooler suffice, or are you thinking AIO?