Do guitarists still use tube amps?

The Marshall or Fender guitar tube amp is still the most highly desired possession of a guitarist or even the good old HiWatt which is making something of a comeback today. Next time you see a band on stage, a Marshall or any of the above won't be far away. Most of these products still exclusively use tubes because of their even-harmonic distortion, as a guitar amp over-drives the tube and the distortion component is most desirable.