"Model proliferation" refers to the increased number or variety of models that are being created or used. It suggests a situation where there are many different versions or types of something. Full definition
BMW has so many model proliferations that even the savviest of brand owners are likely confused. (cars.com)
So the steeper development costs have prompted the company to consider model proliferation, said Joseph Bakaj, Mazda's head of global product development. (articles.orlandosentinel.com)
This consistent BMW goodness, which also pervades the high - quality and ergonomically friendly interior, is ultimately what makes all this model proliferation acceptable. (automobilemag.com)