On Mon, 17 Apr 2017 15:24:41 -0700 (PDT), Tim
wrote:

4:35 PMPoco Deplorevole
- show quoted text -
A MOP is designed to penetrate, deeply, then explode. It is designed for a point target, such as an
underground nuclear weapons production facility. The MOAB is an area weapon with tremendous
overblast designed to crush whatever's below it.

Besides, the MOAB is cheap. The MOPs run about $16 million each.
....

Germany had a giant MOP sorta thing that were dropped over London in hopes of paralyzing the tube system the idea was to not explode on impact but to bury deep then the timer might ignite even days later destroying trains, tracks, people...

In the 60s they actually found some un exploded ordnance in the subway systems there. Maybe into the 70s.

The Brits made a 22,000 lb penetrator to break the sub pens on the
French coast too. It was basically a gun barrel, stuffed with Torpex
and a sharp cone welded in the nose. It used a tail fuze with a time
delay around a quarter to half a second. They also had a rocket
assisted bomb that came in a bit faster.
They didn't really know how well they worked until after the war and
they got a look inside the pens.