For those scared of Radeongate/nVidiagate dGPU failures, opt for Intel IGP then use an external eGPU hackery if your gaming/workload needs GPU acceleration at the desk. Besides chip flaws/BGA/thermal paste factors, notebooks typically face environmental factors which can compound upon a certain flaw--Seagate for example had a 2.5" HDD recall due to read/write heads falling off/ripping off the arm, however real-world data seemed to focus high-humidity regions where drive stictation can occur is how Seagate learned of that specific failure.
Having said that, Intel era of Apple has been better in my experience vs PPC...
--Late 90s my parents iMac 266Mhz suffered a blown power supply and two analog boards... Apple had to replace it.
--15" Aluminum PowerBook G4(2003 FW800), lower memory slot failure however it was easily fixed via re-soldering.
--12" PowerBook G4, was one of the few who reported battery expanding before the recall and Genius Bar staff were more interested in selling me a new battery when I had AppleCare... the logicboard+casing was damaged to the point the replacement battery didn't charge properly so Apple had to repair it after contacting Steve Jobs office.
Intel era:
--Parents iMac mid-2007, most reliable desktop ever--the compact design didn't implode like the CRT iMac and outlived my two desktops.
--2010 MBP, my power adapter at the start of the year began leaking capacitor fluid which was replaced free of charge but I also needed a new battery so it balanced out. Hinges are still tight like the day it was bought... can't say the same about my Thinkpad T61(2007), after 3yrs(2010) the screen wobbled like a bobblehead as the hinge is loose.
--2012 MBP, still runs like the day I bought it and replaced the HDD with a Scorpio Black... less noise than the 2010.
As far as PCs go...
--Dell XPS Desktop(1998): Parents suffered something like 5 motherboard replacements, 2x memory replacements, CPU replacement(on-site guy forgot to plug-in the heatsink fan shroud so the CPU cooked to death)--tech later figured it out the PSU was killing the mobo in those two years, avoided Dell Home products since that.
--Dell XPS 2000: Replacement to the above PC, however the above PC made my parents buy the iMac which was hellish. This Dell was the most reliable PC and retired in 2010 via disposal... ah Pentium III era.
--Lenovo Thinkpad T61: My friend who works at Microsoft got me addicted to OneNote so I spent 3yrs managing to avoid the darker Apple MBP failure era(GeForce 8600/Magsafe T-style fraying failures), hinges got wobbley to the point of being distracting so it now sits around as a Pro Tools duty PC for friends who hate Logic X. Most solid notebook I've owned, a friend on campus knocked it off a coffee shop table and broke his toe when it landed on his foot and the HDD+screen survived

(in the process of retirement of this Thinkpad, 2010 MBP will go Pro Tools duty via Boot Camp)
--Dads' HP DM4: It ran so hot it cooked several HDDs under warranty, at the 10 month mark one of the hinges failed which HP excludes claiming its normal wear & tear. It remains laying around the house stuck open or the screen will shatter if you attempt to close it

(my mum bought him a Thinkpad to replace it)
--Mums HP G6: She wanted a notebook to use in the kitchen/Hulu, AMD A4 was ideal as it provided snappy GPU acceleration vs Intel Pentium G-series(Intel IGP 2000HD). She bought an in-store extended warranty, flex cable+screen failure happened at the 3yr mark... if there wasn't an extended warranty the flex cable would have been $30, screen $100 and labour $150 (HPs require a full tear-down for a screen replacement).