My spare desktop with Core i7 2600K (10 years old now) still works, despite it was practically turned on and off pretty much every day... And the CPU has been running overclocked at 4.4GHz the whole time at around 1.3V vcore. Only thing I observed as the CPU aged was that I had to slightly keep raising the vcore voltage over the years to keep it stable at 4.4GHz. Another system with Core i7 7700K, still running with 0 issues since 2017 and was used in similar manner.
Many people I know have had really similar experiences as well, like 1 guy had his i5 2500K system work over 8 years before the CPU finally gave in (he auto overclocked it, so the CPU degraded quicker from higher voltage). And yes, he did also turn it on and off every day. So I disagree based on experience with that article. Modern computers can handle turning on and off just fine. That was something you'd worry back in 1990's and early to mid 2000's... Today? Not really.