PP is an affordable commodity plastic, but in many cases, its versatile qualities might offer a valid option for applications that do not require high strength, stiffness or thermal resistance.
Alloys of semi-crystalline and amorphous plastics, such as ABS/PA or PC/PBT, can be tailored in an attempt to combine the best qualities of both material groups (which includes the risk of combining the worst).
Technical does not automatically equal poor appearance. With proper design and appropriate tooling/process, the result can be visually very pleasing using semi-crystalline materials. Making amorphous materials withstand continuous load or chemicals is a harder task.