Tube components do generally operate at higher voltages than transistor equipment, but in general I don't find a big difference in lifespan between the two types.
There are too many other variables involved, such as the brand involved, owner useage, ambient conditions, associated equipment, line voltage, frequency of relocation and so on.
Think of cars as an example. Some cars are better built than others, but even a model with a great reputation can be easily run into the ground in the right circumstances.
A month or two ago I finished rebuilding a 50 year old tube amp for my second system. It is working like a champ. On the other hand, I'm currently rebuilding a 35 year old transistor amp and am finding it slow work to run down the problem.
My generic advice would be to buy the component that sounds best to you that still has a good reputation.
There are too many other variables involved, such as the brand involved, owner useage, ambient conditions, associated equipment, line voltage, frequency of relocation and so on.
Think of cars as an example. Some cars are better built than others, but even a model with a great reputation can be easily run into the ground in the right circumstances.
A month or two ago I finished rebuilding a 50 year old tube amp for my second system. It is working like a champ. On the other hand, I'm currently rebuilding a 35 year old transistor amp and am finding it slow work to run down the problem.
My generic advice would be to buy the component that sounds best to you that still has a good reputation.