Class A amplifiers

i have a very nice sounding class a amp... 75 wpc... i run it 8 hrs a day 7 days a week

i take it to jiffy lube first of every month... they do full lube job and change the air filter... i plan on driving it forever

I haven't had the personal experience, but when you see old class A Krells for sale, (as one example) the seller will frequently mention that all of the power supply caps have been replaced at factory; and I have read that it's because of the high heat generated over years of constant use. For that reason, I have always avoided buying a used one even though I was tempted when I saw one that hadn't been refurbed. 
Is there no truth to this?

Those old Krells are old. Any amp that old needs work like that. I spoke to Krell and they were actually pretty cool. The guy in service dept I spoke to told me what models to look for and which to stay away from. Also told me I’d I sent him the serial number he’d look it up before I bought it to make sure it wasn’t some lemon. I F I go with Maggie’s I want to get one of those old monsters , but more likely I’m going to find a smaller used one , I found a Mark Levinson 50 watt , or I’m getting the Sugden and getting just efficient speakers. 

+2 @dill.
Charles 

I know there are many FirstWatt amps, class A, that have been running for many years without needing service. My J2 is only 2 years old, I am thinking I'm good for at least 10 years without a check up.