Interesting Dirk. From my limited experience of having only ever purchased one Seasonic p/s it failed within 2 years of 24/7 usage. I vowed never to buy a Seasonic branded power supply again.

My go to p/s is Corsair and I have had zero failures in 10+ years of 24/7 run-time in many many computers. What usually happens is that the CPU gets so old that it is too expensive from an electricity usage point of view to run a low core computer; better to replace with a new multiple core machine.