Franko, your opinions are always entertaining. But, aside from what you and your brother think capacitors have a lifespan rating. Here is how it is is calculated so you know the facts. Surge really has nothing to do with it unless you used the wrong voltage rating in your design.http://www.illinoiscapacitor.com/tech-center/life-calculators.aspx
Not sure what your getting at, what design ?. And what do you mean facts? Facts denote reality not a predictive formula. From what I can tell this Web site basically confirms Franko's point.. Cold capacitors = short lived capacitors.
Put a voltage metre across the power rails on an Amiga when you turn in on if you doubt the irregularity of power that hits your naked amiga at that time.
Here is Franko who has been using Amigas for nigh on 20 years telling you that keeping them turned on makes them last longer and you quote a formula from an electronics manufacturer who imports components from Hong Kong?
I know who I believe.