Blending need no motion for perfection. Moon moves. Ocean moves. House not move. No wind, trees still. Then good for blend. Blend not always answer.
Irrelevant to his point that clicstudio's post was nothing but hyperbole. Having said that, manual blends do not require there to be no motion. There simply has to be no motion which crosses a (feathered) boundary. I've done many manual blends involving the ocean.
Try blend Formula 1 car photo when racing: 300kph = 1cm at 1/8000. +2 EV, car move 4cm at 1/2000.
There is no situation where a Sony could capture a Formula 1 photo but a Canon...or even an older Canon...could not. You do not encounter extremely wide luminance ranges in those scenes. Formula 1 races were shot with original 1D's without blown highlights or blocked shadows for crying out loud.