Tubes AND SS?

Do many have both tube and solid state electronics?  How often do you swap them out?  
I have an SS and a tube power amp that I switch between a few times a week depending what I’m listening to and for how long. Just seems a waste to burn up tubes if I’m only watching TV.
I used solid state for the home theater and the big stereo, with the big high quality gear, has tubes.
Since the home theater runs every day for hours, since it plays music beside movies, I upgraded the speakers and power amps there.