Valengo, the 'square' airfoil section parachutes were originally developed for military use, but not for mass drops. They are used mainly for specialist insertions, by small teams, for example the S.A.S., where accuracy and range are required. They may be used for HALO jumps, where the parachutist exits at high altitude, but deploys the canopy at perhaps 1,500 feet (450 m), or perhaps HAHO, high altitude, high opening, where a team may leave an aircraft at, say, 30,000 feet (9,000 m), and then 'fly' for up to perhaps 25 - 30 miles (40 - 48 km) to land on or near their objective. This might involve exiting the aircraft in 'friendly' airspace, allowing incursion into enemy territory without detection, most probably at night.
The main reason these canopies are not used for normal, static-line mass drops is the level of training required, and the low altitudes used in this type of drop, possibly as low as 500 feet (150 m) where the risk of collision and injuries is quite high, therefore negating part of the assault force.
I doubt if the para in the B&W pic even felt any discomfort, as that DZ looks very good, compared to some I've 'arrived' on !