Lifespan of a quality solid state amplifier?

My personal experience of owning SS gear for many years is that leaving gear on 24/7 is silly, wasteful, completely unnecessary, tawdry, untoward, and pretty much unjustified by any meaningful data ...the wasted juice far exceeds the cost of any "premature ageing" of a component due to turning it on and off.

I might be halfway through my life and I feel radioactive sometimes so it's "win win".

True story: I had a 1960 Fender Deluxe guitar amp (brown tolex vibrato version...no reverb) that I thought needed attention (I'd owned and used it as a studio amp for 35 years or so) before selling it (mistake). It had old leakey caps...a reliable tech swapped 'em out for nice new ones resulting in my amp sounding exactly the same.

In the manual for a Pass Labs amp, Pass says in the most common sense no bullcrap manner something to the effect that it will take a LONG time for caps to fry, and the caps let you know when they're dying so you'll have plenty of time to get 'em fixed. I've inspected my circa 1997 Forte' amp and it looks fine, sounds GREAT, and sure, I'll send it to Soderburg eventually...eventually...

I admit that I'm wrong for not being more adamant and argumentative with my opinions.

Like most of the bozos on this bus, I get bored and sell things eventually...while they still work...clearly a large part of the fun of this hobby along with discovering new stuff. I'm sort of looking forward to my Forte' seeming to need sonic improvement as that's my incentive to get all those cool-man upgrades to it...if I don't sell it first.

I attended Harvard...it was a Thursday.