I won't do other people's installs anymore as the support adds up, such as Powerpoint presentations not opening properly in LibreOffice, but the systems just work. Most people spend their entire time in a web browser anyway, so there isn't much to go wrong.
Note that I praise Ubuntu as a desktop even though I personally use CentOS as my desktop. It is Ubuntu that brought Linux to the masses.
I think this part of your comment is key:
> I have had zero problems that took more than a casual google to solve
The problems I have on install are (almost) always solvable in an hour or so of Googling and messing around in the terminal or in config files. That includes the two examples I gave earlier - I've got those working now. But that's an hour for us, people who do this stuff every day. A random person who isn't so good with computers and decides to try Linux really needs everything to work.
Even this:
> Most people spend their entire time in a web browser anyway, so there isn't much to go wrong.
isn't always a safe bet. I installed Ubuntu for someone who basically just wanted to check emails, write documents, and watch some on-demand TV. The on-demand TV site didn't work because it needed the HAL layer in Flash and that'd been removed entirely from Ubuntu. Luckily someone has kindly hosted a repo with the required files[1]. But a random newbie is never going to get that working. Yes, the site requiring Flash like that is a bit out of date. But it still works on Windows and Mac.
[1] https://launchpad.net/~mjblenner/+archive/ubuntu/ppa-hal
Haven't had any Mail.app problems yet but I run an empty inbox.
Also, they are currently in the process of rewriting the build system, with a preview shipping with Xcode 9.
This is clearly an exaggeration, as is "Nothing on windows works properly for months if not years.". If 'nothing' works, then how do developers like myself use Windows very successfully for creating and maintaining software? Either you've been very unlucky or made bad choices of hardware.