It seemed like for a while, everything they made had an MB. X-factors, some Charges, Tropicals.
It's the wheel of reincarnation at work. MB gets hyped up, it's the big, trendy thing, and gets put into everything. Entry angles no one thought were possible. Recovery and angle in heavy oil. Faster, smaller spin times. You needed your own ball rep to tell you how to drill the things. Then the angle got out of control and smooth, controllable, and ease of drilling are back in vogue. Two or three years down the line and it'll be back to asyms.
SH