Well, I still have to disagree, at least to some extent. And not with a -1 mod (I hate that too, btw).
I think the biggest difference is in whether you buy bottom of the barrel priced and quality stuff or not, even with computers. For example:
I purchase my computers from a custom PC boutique dealer and probably pay half again as much as a comparable brand from a box store, maybe even more. But these guys analyze each component for failure rates out in the field, and only sell the highest-rated parts in terms of reliability. They also do more extensive burn in tests, thermal and airflow analysis, etc. Yes, they're the same components everyone else uses, but there are many differences in quality among those common components, and even in how carefully a PC is built, and how stable a system is without a bunch of crapware installed. So, generally speaking, the computers I buy tend to last a long time, and that includes the PC I purchased earlier this year as well (a Linux dev machine).
By contrast, do you remember Packard Bell computers, popular a few decades ago? Those were absolute pieces of crap, and I'll bet few of them managed to last five years. Relatives that bought those computers seemed to have nothing but problems with them.
As far as early failures go, yes, you're going to have some failures at the relatively low prices we pay for electronics these days, but I'm not sure it's any grand conspiracy to deliberately make things more fragile. I just think that failures are more likely to occur as our devices push technological boundaries and get more complex, meaning they simply have more potential points of failure, while at the same time dropping dramatically in price from what we used to pay for these items. And yes, occasionally, you find a brand that is just badly designed - junk from the outset. A bit of research helps to avoid most of those issues.
Smartphones are a different matter - I agree there's some planned obsolescence forced on us, simply because the carriers and manufacturers stop supporting perfectly good hardware with updates. But that's not really a technological matter, but a policy issue. My three year old phone was top of the line when I bought it, but now is apparently "obsolete", which is ridiculous. It still can run nearly any app or OS version just fine, only it's no longer being updated.