Gigging can be tough on machinery as well as people.
Trying to pack up all the equipment and keep it in good shape can be problematic.
The only thing that can be tough on floor models is Small children that are not being controlled, and come along and beat on the keys and tweek knobs and sliders like they are shifters on an old tractor.
The run time just sitting idle is certainly not a worry.
I watched a youngster (maybe 6-7 yo) just whailing on the keys of a KB in the store and his parents did not even give it a second glance.
This said, I have seen some serious abuse done to these things by the owners when playing gigs too. Some of the on stage antics can be a bit over the top.
If the boards are placed in a hard carry case thats padded well, there is usually not too much issue.
My biggest fear is of someone wandering into my studio with a cup of coffee or a can of soda and spilling it on the board.
I have a rule (for whatever thats worth) NO drinks near the boards PERIOD.
Other places in the room are no biggy, but NO drinks right at the boards.
Now if your gigging and need to have a drink close for those hot times, one just has to be careful.
This is why many folks invest in the NO BS anything goes warranty coverage that will fix the board if someone does make a BOO BOO and spill on it or whatever.
Snowy