In general, tube amps do run much hotter than class AB solid state. However, some Class A solid state amps run as hot as tubes.
There are many variables that will affect how long a tube last. That includes the design of the amp, the tube type, who made the tube, your listening pattern – do you keep the amp on all the time or only turn it on when listen, how stable is the voltage of your power outlet, etc… In other words, it is impossible to make a general statement about tube live.
There are many variables that will affect how long a tube last. That includes the design of the amp, the tube type, who made the tube, your listening pattern – do you keep the amp on all the time or only turn it on when listen, how stable is the voltage of your power outlet, etc… In other words, it is impossible to make a general statement about tube live.