Avereage lifespan of amplifiers?

If you want to upgrade your Adcom GFA 5800, consider the BHK 250. This power amp has amazing musicality probably due to the tubed input stage. I was really impressed when I compared it to the Bryston 14-B SST which the Bryston sounded a bit dryer in comparison, and the Bryston is no slouch of an amp. There is a great deal on a refurbished unit from PS Audio right now.

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I must say that you’ve got me thinking.

But i was really leaning towards the endless watts of the M1200, as well as that light weight and cool running…

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Would that life time expectancy also be valid for modern power regenerators given their similarities with power amps?