My personal anecdotal data (Android devices):
* LG P509 (3.2" screen, Android 2.3) - Have 2 of those. Going strong with some old Cyanogen Mod version (7 I think) but I'm not really actively using them..
* Google Galaxy Nexus: Obsoleted by manufacturer. Also had cracked screen, the crack was small initially but then got bigger and bigger. Don't remember dropping it. OLED burn-in. Battery was not holding charge after 2 years but at least it was serviceable. Overall rating: crap (mainly due to poor screen). Granted it has been my best experience with Google Nexus line.
* Google Nexus 7 1st gen: Faulty charger circuit (took a day to fully charge, common issue). I configured it with encrypted file system, but little did I know then that Google released it without even testing it. Eventually it got slow to a point where a single operation would take 5 seconds to refresh screen - no TRIM support for encrypted fs driver, slow software encryption are the culprits if anyone is interested. Got rid of this shit the first chance I could (traded in for $50 BestBuy giftcard).
* Google Nexus 4: This is the biggest garbage of them all. Faulty hardware design - no cpu heatsink (or was it gpu?), battery too close to cpu and gpu. More info about this here: http://forum.xda-developers.co... . When you run any cpu-intensive app it would overheat so much that it gets uncomfortable to hold phone. Charger circuit would cut off battery charging due to high temperature. If you are not on charger it would reboot the phone at some point. That's how hot it was getting. The cpus are binned slow, nominal, fast. Luckily mine was "fast" so I was able to significantly undervolt this (yes, had to recompile the kernel) to make it somewhat better. It still randomly shuts down sometimes but not as bad as it was. Oh yeah, obsoleted by manufacturer (no updates).
At this point I stopped buying Android crap.
Personal anecdotal data (Apple devices):
* iPad 2: Still going strong with latest iOS. Granted the OS upgrade has made it very slow but this is only when you are starting apps or in main screen. Once app loads it's OK. Switching between apps is slow. I can't wait for it to die because it is super slow and I hate the low resolution screen but it just keeps on going.
* iPad Mini 2 - Have 2 of those. My favorite. Going strong.
* iPhone 5S - Have 2 of those. Going strong.
I know this is very anecdotal but I haven't had a single Apple device fail or require some tinkering to make it work.