Fads come and go. Many can be good, even if only briefly. A few might be bad enough to later stigmatize the object of the fad. For example, the formerly esteemed crape myrtle is now familiar as a mundanely common tree.
Flashy bloom and complaisance contributed to its excessive popularity. Most sorts of juniper are similarly victims of their previous fad.
A few cultivars of juniper suddenly became overly popular during suburbanization of the 1950s. They were remarkably reliable and resilient. Most were shrubbery or low hedges. A few were groundcover.