I've echoed the point numerous times, saying that a plus for Rolex is that it's easy to get them serviced just about anywhere. Your local watchmaker probably has a parts account, the movements aren't that complex anyway, and so you don't have to either send your watch to all the way back to Switzerland — or Japan — or just one of a couple major service centers in-country.
Or that's how the thinking goes, anyway. I can speak for myself in that, a few years back, we had my wife's OP fixed by a local shop who used their parts account to get a genuine Rolex crystal.
Is it still true, though? And is anything happening that could change this?