Obviously, having a winder is convenient. Above and beyond that, is there any reason to do have one?
I have read here that watches run more accurately if they are fairly fully wound.
I think I saw somewhere that there can be a problem with lubrication pooling or some such thing with prolonged inactivity. (Is this true, and if so, how often does a watch need to run to keep this from happening?)
On the other hand, presumably if the watch is always running, that's more wear on the mechanism.
So on the whole, is a winder good for the watch, or just for its owner?