The trend in O/U field guns appears definitely to be to use automatic tang safeties. Browning still uses pure manual safeties. Ruger has manual safeties as optional. Most others use automatic. Ugh.
My Beretta 12 gauge field gun has an automatic safety and since it's a field gun I don't think it'll be a problem. But if you were to use such a gun for skeet you'd probably not want the automatic safety.
Fortunately in the case of the Berettas it's a minor operation. Unfortunately gunsmiths will not do it for you because to do so creates a liability problem for them. This is a booger because you can get the same action in a different configration, say sporting clays version, that has a manual safety while the field model has the automatic safety.