And if you've ever had a mechanical linkage fail, or noticed that wiper linkages only work for certain geometries, you appreciate the reliability and versatility that comes from having separate motors.
Also, one wiper arm can be completely jammed or disabled and the other still works, where a mechanical linkage would be down for the count.
Cost will come down. Power windows used to be a luxury item too, now they're ubiquitous because the hand-crank mechanism is not only more expensive to produce, it also placed constraints on door panel styling, and having a single door design is cheaper overall.
When the hood and windshield don't have to accommodate a wiper linkage, engine packaging gets easier, allowing designs that could be safer, cheaper, more efficient, more reliable, or some combination thereof.
Also, one wiper arm can be completely jammed or disabled and the other still works, where a mechanical linkage would be down for the count.
Cost will come down. Power windows used to be a luxury item too, now they're ubiquitous because the hand-crank mechanism is not only more expensive to produce, it also placed constraints on door panel styling, and having a single door design is cheaper overall.
When the hood and windshield don't have to accommodate a wiper linkage, engine packaging gets easier, allowing designs that could be safer, cheaper, more efficient, more reliable, or some combination thereof.