That is one thankless-ass job. I’ve done it. Just be aware popcorn ceilings applied pre-1978 can contain asbestos. A lab test with a local hygiene company is cheap and worth it.

If you’re fortunate enough to be dealing with originally applied product that turns to paste when soaked with a hand sprayer, it’s not as bad, because particles aren’t liberated as much. But many older ceilings will have been painted over a couple times, making mechanical removal and a lot of suspended particles in the air inevitable.