Well... A Multi-link front can be configured in a format that is equivalent to a double wishbone. For example, the Lucid Air has a lower "A" arm, and a two piece upper arm that is configured in a way that behaves exactly like a double wishbone. So in effect, it is a double wishbone. Although strictly speaking, because the two piece upper arms are not the traditional "A-frame" set up, automotive engineers do not typically call it a double wishbone - even though in my book it is a double wishbone. Main advantage of the double wishbone is that it has two areas of pivot, one in the wheel and one above the wheel, this allows more articulation of the wheel to adapt to the changing curvature of the road. A McPherson Strut only has one area of pivot (a lower A-Arm) and this means it does not allow any real articulation - just a mostly straight up or straight downwards motion.