Are you aware that you can install a Linux distribution on just about any hardware? System76 are OK, I've never been wowed by them. Realistically, I would just go with a Thinkpad, unbeatable keyboard and great build quality (though lately Lenovo has been messing up on both of those)
What about the hunter gatherers that don't have access to as many non-meat options? Inuits, for example, ate mostly meat (with up to 75% of their calories coming from fat) because they were limited in what plants they could gather.
I think the more likely answer is that humans are capable of surviving on all sorts of foods, not "there is one hunter gatherer diet and it contained very little meat."
"Man I really like these tungsten circular saw blades! If only I could use them with my hammer."