According to Wikipedia, the Ingenuity helicopter is an astonishing piece of engineering having some attributes beyond the equivalent of the classical helicopters:
The lower gravity of Mars (..) only partially offsets the thinness of the 95% carbon dioxide atmosphere of Mars thus making it much harder for an aircraft to generate adequate lift. The atmospheric density of the Red Planet is about 1/100 as that of Earth at sea level, or approximately the same as 87,000 ft (27,000 m), an altitude never reached by existing helicopters. To keep Ingenuity aloft, its specially shaped blades of enlarged size must rotate at a speed at least 2400 and up to 2900 rpm, or about 10 times faster than what is needed on Earth.
I am wondering if the research done to make Ingenuity work can be used to improve helicopters flying in Earth's atmosphere or it is solely useful for very narrow cases like flying in very low pressure? Is the special design applicable to increase the maximum altitude for helicopters flying over Earth?