Neutral screened: Do you mean just a concentric copper neutral? These have become the norm for new installations here now, whether overhead or underground, although for the latter they're enclosed within rigid PVC conduit for protection.
The old underground service cables that can still be found in many towns had a a solid lead armor.
SWA is still very common for underground feeders on the consumer's side of the meter, e.g. for a feed to a detached garage or workshop.
