I really wonder with angle grinders, for example, how many are bought to do a one-off job and then set on a shelf for 20 years, versus being used daily until th

I really wonder with angle grinders, for example, how many are bought to do a one-off job and then set on a shelf for 20 years, versus being used daily until they break. Maybe Harbor Freight is just selling something appropriate for it's real customer base.