Production costs!

The expanse did this well because they used acceleration not artificial gravity.

THE EXPANSE

GO WATCH IT!

No stupid gimmicky "artificial gravity" horseshit, the "gravity" is caused by acceleration and deceleration.

Who else is thinking of that one scene near the start of Star Trek VI: The Undiscovered Country?

Admit it, you wanted to ask which movies and shows have done it. Instead of asking for people to tell you what the correct answer is, it’s far more effective to post the wrong answer, and wait for the flood of answers to arrive.

"Gravity plating!" As long as there is floor, you're good.

Gravity is a very dense liquid. Generator makes it in big batches at a time and it just stays there for long even after the generator is gone. After the battle is done and everything is repaired, they just top up the pool and all is good.

On a space station more than a space battle, but Titan AE had a scene that made good use of this. The station is old, and early in the scene the gravity generator goes on the fritz, causing everyone to float until some percussive maintenance gets it working again. When bad guys show up Matt Damon shoots the generator to cause some confusion and let him escape faster by pushing off toward the exit.

Gravity is on a separate subsystem & power supply, because without gravity people couldn’t reasonably move and fix the rest of the ship, so even when compared to general life support, it’s the most critical function and the most isolated.

And production cost.

Doylist explanation: it would be too expensive for the FX department.

As it happens, the same worldbuilding project I mentioned in another post here sort of addresses this. The same aliens mentioned there don’t use artificial gravity at all. Being arboreal creatures they’re well suited to microgravity and can happily live permanently in zero G. Upon meeting humans and learning that we want artificial gravity (specifically centrifugal gravity), they wonder why we spent all the effort to get away from gravity only to spend even more effort to bring it back.

Since human orbital colonies take the form of O’Neil cylinders, you can cut off the gravity by halting the cylinder’s rotation. If stopped abruptly enough this would cause a lot of damage initially as objects go flying. It would also put the terrestrial, bipedal humans at a disadvantage compared to the aliens with five prehensile extremities.

I am a big fan of sci-fi and understand how expensive weightlessness is to film, so combine that with the amount of shows that have been canceled and I completely accept the fact that they try to keep this more fictional than science.

Titan AE

"Just think of it as floaty time!"

Star Trek VI - The Undiscovered Country did it, even making it a point during the Trial ;-)

If it were expected to be more than a 1 in 1000 risk, they would probably have handles on the walls and ceilings to help move about during an emergency.

What you’re really saying is there aren’t enough big budget sci fi things to watch.

That's why I prefer hard SciFi like The Expanse books, where science is a main driver to life and motivations to drive the story.

They did in the first episode of Transformers Animated. Granted, that was a cartoon, which made it infinitely easier to have them float in zero gravity than a live action movie.

Cough, Undiscovered Country.

Even when the life support systems have completely lost power, everyone is dying, etc. Gravity is the one system too critical to reroute.