You can 100% work your way to a senior position without ever leaving windows. The people who are like that just don't tend to be hanging out on platforms like HN.

i was hiring for a senior devops role a few years ago. part of the interview was ssh into a machine and debug some web server configs we purposely broke. step one was email an ssh public key to me. now, i dont remember the command cause i do it so rarely, i dont expect them to, but for a senior role we expect you can google this, its not supposed to be hard. the number of people that could not generate an ssh key was crazy. i had people emailing me their current company private key. and if we did spend half the interview on the key, they never could pass the trivial part of how we broke it, which effictively just required reading the log file.

They know that it's a magic box into which you paste whatever incantation is in the README.md or spoonfed to you by an LLM, but otherwise have no mental model of how it works. Hell, they didn't even have the reflex of pressing "arrow up" to correct a mistyped command. And don't get me started on the lack of mastery of their tools - whether Docker, package managers or other tools they use daily.

(and speaking of LLMs, those can actually be a wonderful teaching aid - but they don't seem to be bothered by their lack of knowledge and so don't even try to take advantage of them)

I bet the guys are good at Leetcode though, or whatever bullshit interview process that hired them. This is in a Western European company that has adopted all the "best practices" possible, and places high importance on career progression, and these are considered senior SWEs on track to become engineering managers.