One of the most salient features of our Tech Hiring culture is that there is so much bullshit. Everyone knows this. Each of us contributes his share. But we tend to take the situation for granted.
Majority of developers use Linux and many organizations do use Linux, yes for commercial desktop market, Linux hasn't been successful, but at least it is viable alternative if you are willing to switch. For phone, there is no alternative.
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Linux didn't make a dent whatsoever on the desktop where Microsoft Windows was
Linux succeeded on other markets: server side, embedded devices, chrome OS, Android, ... all that run on Linux
Majority of developers use Linux and many organizations do use Linux, yes for commercial desktop market, Linux hasn't been successful, but at least it is viable alternative if you are willing to switch. For phone, there is no alternative.