I have 4 different kinds of vibratory tumblers,
And I regularly tumble brass for 8 hours or a little more.
Put the brass in the tumblers, Flip the switch before I go to work,
Turn them off when I get home.
Nice clean brass...
Bottle neck brass for accuracy rifle I use the wet/SS pins.
Since that is usually in small batches, and it's pretty quick to get REALLY clean, it's the way to go.
Those large batches of 'Plinking' handgun brass, stright walled cases,
Stuff I'm not going to clean the primer pocket to SPARKLING and the media does a good job inside the case,
It's the vibrators all the way.
So very little of my time required makes it a good way to do rounds for the visitors/inlaws to shoot until they get tired of holding the firearms up and loading mags...