I don't think that we should encourage questions such as Is GNU/Linux still relevant?. These types of questions bring out strong emotions or exhaustion for people who have been involved in the debate for a while and are boring for those just entering the Unix and Linux world. To some extent this applies to other classics such as "Vi vs Emacs" but while discussions such as "Vi vs Emacs" can be rich with technical comparisons and hacker humor (Emacs May Allow Customized Screwups?), discussions that get into issues of software freedom (GPL v BSD, GNU/Linux v Linux, etc) just go in circles, rehashing old arguments, boring those who don't care and angering those who do.
Perhaps this is just a gut reaction to opening up SE to see if there was anything interesting before I dig into work and then seeing "Is GNU/Linux still revevant?" and thinking "oh God, not this."
Don't get me wrong. I care about free software a lot. I have strong opinions about these holy wars. But I don't think these types of debates really have a place here. Namely, I don't want people with questions about proprietary unices to be discouraged because they see this as a "Free Software"-only forum and I would hate for "Free software" people to think this is an FSF or GNU unfriendly place (not that those two orgs represent all of free software, they are just examples).
I'm not sure whether closing these types of topics is the right course, but at the same time, I think that if those types of questions are on the front page, a good number of people are just going to leave.