Well I'll put it this way: I've owned three Windows laptops and one Mac and the Mac has outlasted all three individually, two of them combined, and on track to outlast all three of them combined in the next year.
It also has yet to slow down.
But that's just my anecdotal experience. Think of it what you will.
Same experience here. 1 MBP has outlasted (and is still working like new in most important respects, including battery life) the combined lifetimes of all 3 plastic garbage Windows laptops I've owned before getting this one. That's 5 years and change, still counting.
I'm no Apple fanboy, but the difference in hardware quality is incomparable in my limited experience.
I have exactly opposite experience. What I've bought from Apple ended up breaking or revealing hardware issues after the warranty was over and outside of the series that was entitled for free replacements.
I bought Apple Mouse and found that I have to clean it every week and that to do this I have to break it, because it's not meant to be taken apart for cleaning. And to take it apart I had to deal with two tiny connectors and three very small screws and other paths that are rather hard to handle. Compare with my Logitech mouse: I can easily take it apart with a plain screwdriver and over ten years of everyday use I only had to do it twice.
I tried to install new memory into my old Mac Mini myself (there's no Apple service where I live) and while I'm reasonably savvy with this, I ended up breaking one of the plastic holders and probably broke the sound somehow, because now it is silent. All this was in vain though, because it turned out Macs require some very specific memory chips, usually twice as expensive as normal ones.
The only working piece of Mac hardware I still own is an old Mac Mini that is practically unusable since I've had to upgrade the OS to v10.9 or 10, I forgot which. Everything became so slow I could not believe it. Fortunately, all I need from Mac is to compile code for Mac OS X and I can do this via SSH from my Windows laptop. It certainly works faster this way.
I don't think I'll ever buy anything from Apple unless I absolutely need it for business and that is going to be the cheapest option.
I've had two MBPs since 2007/8 and the first one still works just fine- in fact it works great with upgraded RAM and an SSD. The second is a late 2014... I was on a 2 year cycle with my PC laptops. Batteries, screens, the fact that they were shit to begin with...
It also has yet to slow down.
But that's just my anecdotal experience. Think of it what you will.