Linux

No because Linux still has some usability issues that normal people HAVE to wrap their heads around. People switching to Linux HAVE to understand there are going to be some pain points that they have to figure out. We already exist in a culture that HYPER consumerist and people constantly buy shit they don't fully understand the use for and maybe don't really need. Things are better with Linux now and they're getting better but a lot of projects are also run by volunteers, it's going to be hard for them to a)scale up their processes and b) keep working on stuff with little-to-no compensation. And people don't like paying for software if they can help it soooo.. yeah. As good as Microsoft is at making the argument for switching, the linux push is probably, in actuality, a major push for iOS. And this is from someone that only switch to Ubuntu last year and doesn't really mess around with the terminal and config stuff and finding my time to be pretty solid with some hiccups there and there. I have, probably, more understanding that the majority of people that use computers and whatnot but I wouldn't say I'm an advanced/power user but I still have issues with getting some things going easily/effectively, just because solutions always involve a google search and someone on a forum also having the same issue and giving out what they tried to do to fix it and that's not what most people want, they usually just want to having an experience that works and they don't have to fuss with (which is why defaults matter so much).