While 'use linux' isn't helpful, mentioning that something is common to linux at least lets me know that I could check in with brew to see if I can use it on a Mac. If so, I can learn it to see if there's a way to make it easier for less technically skilled users. So sure, a comment could be better phrased as 'is there a way to use app X commonly available on linux on other platforms?' But at least apps are getting mentioned for others to investigate.