I'm a mechanical engineer masquerading as a software developer so I could be talking out my ass, but I'm fairly sure that board failure rate is proportional to the amount of discrete components on said board.
[0]: https://news.ycombinator.com/item?id=17444076 [1]: https://www.youtube.com/user/rossmanngroup
These mature cheap reliable mass-produced electrolytic capacitors of which we rarely see fault today, sure had quite the rebellious stage[2] [3].
Interesting, from the announcement on badcaps.net[3]:
"Back in April 2002, I had an idea to start a business (actually spinoff of another business) servicing motherboards at component level amid the mass capacitor failures plaguing the PC industry."..."The store boomed from its launch all the way up until about a year ago. Over the last 6 months or so, I have sold very few capacitors. Once my stock depletes, I will be shutting down the Badcaps.net store."
For laptops this kind of environment is common; in fact most of Louis Rossmann’s repairs are about liquid damage.