Leave tube amps always on?

No matter the built-in protection, I take the point about gas filled tubes and fires and its enough convincing for me to shut it down every night or when we leave the house. Thanks for that gloriousunicorns :)

I guess it just comes down to some daily thought around when you may use your system throughout a normal 10 hour period in that day and plan accordingly 👌 So one follow up may be if I use my system on the weekends in the afternoon, take a few hours break and then again at night --- what say yee - on or off?

As a side matter, I have left my solid state amps always on 24/7 in my home theater room since 2011. And that was on the advice at the time of just about everyone on the theory that they draw very little power when idle and not being used and there is a bigger risk with the amp breaking down with constant switching on and off.

I still turn them off even if I know that I am going to listen later

I thought that David Berning was the sole designer of the LTA gear.  

I don't own LTA, so maybe that is a very special case. Can't speak to it.
In addition to fire hazard, tube life (both good points), my gear consumes over 100w when idle. I listen probably 2 hours a day, maximum, on average. This probably doesn't mean much, given the other factors, but at my electricity rates, the difference in energy use is $105 vs. $9. For decent tubes, that's the cost of about 2 tubes per year in energy savings. Over a few years, it would add up.

On the LTA website it mentions that they drive the tubes with 1/3 of the amount of current that typical tube amps use which is part of the recommendation.
Also many believe that tube life is shortened because of multiple power up / power down cycles. Consider the physics of a cycle- abrupt current and heat to a cold tube and tube glass, thermal expansion differences between materials- e.g. glass and different metals and pins that are expected to hold a mechanical vacuum to survive.  Running at temperature and maximum thermally expanded state for many hours then a rapid cool down / thermal shrink after power down.  This happens every power up / run/ and power down.  Thermally and mechanically stressful to the tube elements and glass.  

Most tubes do seem to fail at startup as opposed to failing gracefully while running- similar to an incandescent light bulb.

I would consider leaving them on with an LTA product and see how it goes.