Mike Tomlinson wrote:

Spehro Pefhany writes

Also, 50,000 hours 24/7 is only 5.7 years, which is more-or-less what
you'd expect out of a motherboard.

Not from electrolytic caps, which was kind of the point. Even Panasonic
specify only 10k hours for their top of the range electros.

AT RATED TEMP and RATED RIPPLE CURRENT. Rarely found in combination except
by bad design, and it does happen sometimes.

You can get far better by de-rating. Rule of thumb is to reduce the temp
from rated value by 10C and double the lifetime etc etc.

Graham