mister_handy

For some workloads, the 6502 was faster than a more-typical 4Mhz Z80.

Well, it's the last actual MPU from that era, so from the perspective of "you will still be able to buy them when existing stock runs out," sure.

Otherwise, there's no clear winner.

It looks really good on a resume, and _if_ (and it's a big if) you end up on the right team, they have some really cool stuff going on there.

If you know enough Linux to do anything useful with Arch, and you're as CS student at CMU, you're almost certainly qualified for a PE internship there.

Facebook isn't going to blacklist someone over a bad interaction with a university recruiter, at least short of sending an email full of hate-speech.

It's an opportunity missed (it's a great place to have an internship or be a new grad, not so much for senior people who've worked elsewhere in industry) but the OP will certainly have no trouble applying again with some future recruiter.

Speaking as someone who used to work in dev at Facebook, in my time there I saw absolutely no Unix systems, just Linux on the production side. They did have some proprietary systems in corporate IT that could have been running on HP-UX or AIX for all I know, but a PE intern wouldn't ever have touched those.

"A sufficiently advanced incompetence is indistinguishable from malice."