These things are about momentum. Diesel is really common here (my boss drives a diesel hatchback, and gets incredible km/l). Every filling station here stocks diesel. Is it a better technology? Maybe... It is really expensive to fix when it breaks. So it is in a way a really good analogy for Linux. In the some places (the USA), everyone only uses it for servers (big haulage trucks) but in other places it gets used everywhere.
There are pros and cons to every OS. Linux is my preferred platform because I am familiar with it, and I like the interface. I have not delusions of superiority. I have had good experiences with hardware support, and apart from printers (I do not own one, so it is a non-issue for me), I have not worried about linux support for hardware since around 2005. Also, a lot of hardware seems to work better: 3g modems for example - they don't require me to install the operators bs bloatware to use under linux. They just work...
I think the point here, is someone is making an effort to build diesel filling stations. You can still get petrol and it will never go away, but you now have options, and each has pros and cons. I like diesel. It has really good torque. Modern diesels have come a long way in terms of reliability (early diesels were terrible). They aren't perfect, but they do the job.