I don't think it's stuff. It's probably great for some things. But trying to sell a modified version of BSD for $600+ is complete and utter bullstuff.
I also don't really like it because when I picture a Unix system, I picture something like Arch Linux or OpenBSD. These are both operating systems where I get to choose each and every little detail about how I use it.
On Mac, you just have a floating WM with a panel and an optional dock. That's it, you can't change it.
Not everyone is a Linux hipster like you who needs to do everything different then everyone else, and from what I have seen with you; you use the console for the simplest things just for the sake of being different.
My family still has a working computer that they bought about 14-15 years ago. Not a Mac. Slow as hell but still works.
Also still have a computer that runs Windows 3.1, no idea when they bought that.
A computer lasting 4 years isn't spectacular by any means. That's a normal life cycle, if not less.
A better example of lifespan would be the two Power Mac G5's that we still have in our house. My mom is a graphic designer and prefers to use Apple versus Windows, her and some of the people she works with still use the G5's which are now 12 years old and running decently for their age. She also still uses her old MacBook Pro from 2008 which runs Snow Leopard and is still going pretty strong.
As for myself the oldest Mac that I personally used is the Power Mac G5, which I used from whenever I started using computers up until 2011 when I replaced it with my MacBook Pro. The MacBookPro I have from 2011 is still working like new and is using the latest release of OSX. I also owned a Toshiba Satellite (2012) which I didn't use all too much, mostly let my friend use it whenever he comes over 1-2 times a week, that recently took a dump on me.
I guess what I am trying to say is that Apple computers have superior build quality and lifespan when then it's Windows-based counterparts. Also this is just my opinion but I much rather have an Apple laptop/computer sitting on/next to my desk because they also look much more appealing.
tl;dr Apple has better build quality and lifespan than it's Windows-based counterparts.