^yes, tube amps are never bullet proof....
DHT tubes, like the 300b, 2A3 and 845 can have shorter life span
simply because they are run in classA and operates on the brink,
and that is because that is where they sound their best...
so if you have the means, and deeper wallet, then go ahead,
if not, better go solid state....
there are however tube amps that cost less than the usual triodes
if you are not allergic to mere tv tubes....