Tube DAC Conundrum

i have owned several tube dacs, tube amps and rube preamps.

after a listening session, i turn off all tube components.

tube life may be a factor, but also the possibility that if a tube ceases to function, it may damage other parts of the component.

I agree with Mrtennis. I have owned lots and lots of tube gear and always turn them off after a listening session. My solid state gear is left on.

I follow the same practice as the above 2 posters
I am no expert but I think the performance issues are related to getting the tube gear(or any gear) to an optimal operating temperature. I find most tube gears get there relatively quickly.
Now for some reason (unknown to me) I find that unplugging digital gear will then require a longer time to get back to optimal sound once plugged back in so I do try and keep my digital plugged in.