It depends on the class of the car, its size. The more technically sophisticated the suspension, thus it provides greater driving comfort, but also its price is higher, which increases the cost of the entire car. I will give some examples of suspension solutions from the latest models, that have recently entered the market. Alfa Romeo 156 has double wishbones at the front, a McPherson strut at the rear. The Citroen Xsara features McPherson struts at the front, plus a triangular lower wishbone, and the rear features a trailing arm and torsion bar. The Golf IV features front McPherson struts with a triangular wishbone with widely spaced mounting points, and at the rear, two trailing arms connected by a beam and coil springs. Porsche 911 has McPherson struts at the front, plus a double wishbone - one transverse one, the second oblique. The rear has a multi-link system (the so-called spatial, consisting of 4 transverse and one oblique wishbones). Toyota Corolla – front and rear McPherson struts.

As you can see, there is no rule, constructors use various solutions. In cheaper cars, The popular ones are usually sufficient McPherson. In more expensive ones, where you want more comfort, mixed systems are used. The most complicated, while providing the greatest comfort and stability, are multi-link systems. They provide a very high driving comfort regardless of the load on the car, even on bad surfaces, prevent the vehicle from rocking sideways, nor do they transmit vibrations to the body.