I set up LUKS with NixOs like 5 years ago without any prior experience and it was straightforward (just followed the docs). I wish that dealing with nix/nixos was always that easy...
We don't currently have any concept of public profiles open to the internet as a whole, so (at most) we're talking about visibility to recruiters on our platform. (In this case, it turns out that OP had in fact enabled visibility in the past - see the response from our CEO at https://news.ycombinator.com/item?id=31771836)
You can get a shareable link to share on e.g. your personal website if you want to, but you have to manually enable it.
The article doesn't really define rich but cites multiple papers and quotes a few economists. Seems like the core thesis is "having access to money makes you more likely to start a business" which seems like something that should be true. The title is a little incendiary though.
If this paradigm catches on there's no reason you won't be able to do the same thing with your own infrastructure.
I know this is a straw man because I can't know what sort of infra you're imagining, but I suspect a lot of people would be more comfortable with their builds stored on S3 under the scrutiny of their security team rather than on their engineers' laptops.
Been a while since I've read them but I recall there was info about the FSB and northbridge, which no longer exist outside the CPU. They've been replaced by internal memory controllers and PCI-E controllers.
The L2 cache on the M1 is the last level cache (LLC), where the 5950X has a 64MB L3 cache for LLC. Also I'm not sure we know yet how much of the chip is using that L2, it might be more than just the four high perf cores.
A closer comparison is probably Intel's 10900K which has a 20MB L3.