I think it depends on the snake too. With balls, they are eating something no larger than their bodies. With others, like corns for example, they may eat something 1.5x their body width because of their faster metabolism. In this case, I wouldn't stress (i.e. handle) them the next day at least. I'd feel more comfortable holding my ball the next day if I really had to.
But I agree; I think that we use time as our measurement for holding/not holding snakes because it's easiest for us. I think it would be more accurate to hold based on the stress level of the snake.
However, for new owners, they probably won't know what these signs are simply because they haven't seen them yet. So, I think this is where the "Wait at least a week or 3 consecutive successful feedings before handling when acclimating a new snake" comes in.![]()