Over 25 years I have had 1 drive failure, 1 power supply failure. Countless PC's, Laptops and Macs. The next person will tell you never to buy a Mac as every one they bought fails. Another will tell you never to buy a particular brand of x component as theirs all fail.
Or another example, I have web servers located in London docklands, running constant 24/7, one is 8 years old, so that is 71,000 hours constant use, never powered off, not a single issue. Another server 4 hard drive failure in the space of 5 months.
Heavier use in my experience does not mean it will fail faster, but it in every case it depends on the quality of the build, that is not to say heavier use causes failure, cheaper, less durable components will at the same time regardless of use.
As mentioned above, is it measurable? No. Plenty of stats out there but you can't take, say 100 drive failures and link the cause unless every single one was doing the exact same processing.