Bullshit. I switched totally over to Linux Mint last year. I single boot Linux on my top-of-the-line Dell XPS 8700. My hardware specs are an Intel i7 4770k @ 3.4GHz, 8GB (upgrading to at least 16GB soon) and 1TB ext4 HDD. I have some kind of AMD video card, 7000 series I believe. I do have additional storage on portable USB hard drives but no ext4.
I am presented with no boot-loader. Just as you would turn on a Windows only PC and see the Windows splash screen I experience the same thing, only with a Linux boot splash screen. It does everything I want. Yes, it has it's quirks and I've even had to manually edit a text configuration file or two on Linux Mint 17.2 Cinnamon 64-bit, however, Windows has it's quirks, too. It's all about familiarity. Which is why Windows 8 flopped. It's not a particularly bad OS under the hood, I'm sure, but they changed too much.
Linux will take over the computing world in the next five to ten years in some form or fashion. It already has as Android. As far as Linux on the desktop (or laptop) I do see the userbase increasing but not to the level most Linux users would like to see. But, be careful what you wish for.
I love running an OS that is incompatible with viruses and the like. Linux does what I want. It is definitely non-commercial and it shows. Running a distro means that some parts may be incomplete to a point or even buggy. Linux is a continuing digital construction zone. A constant work in progress. That said, I am blown away how far Linux has come from Linux Mandrake 8.0 in 2001 to Linux Mint 17.2 in 2015.
Notice I didn't mention Ubuntu. It's spyware disguised as a Linux distro. Both Mint and Ubuntu don't ship with essential tools to compile but all of that can be fixed - all of it's little quirks. The only thing I'm still on the fence about is compiling from source programs that I can't find in the software center or programs in the software center that just don't work anymore.
That's all for now.