If a thief really wants to steal a bike, they will do it regardless of the lock. A battery grinder and a van can take any bike in seconds. Some brazen thieves will wear masks or full face helmets and steal the bike right in front of you.
What one wants to avoid is the casual bike thief who sees an easy opportunity. Avoid cheap locks that are easily breakable. A chain or a cable are usually strong enough to withstand force. The lock itself is weakest link..
I recommend 2 locks. Front wheel/triangle and real wheel/triangle to a solid anchor. If more than one bike, a daisy chain of bikes is also a deterrent.
Of course I don't believe there are hi tech thieves around every corner, but again, a casual thief sees easy pickings...