In 2019 starbucks has more than 8500 company-owned stores in the USA. How do you explain this difference?

Franchising is widely used in the casual dining and fast food industry, yet starbucks is quite successful with a large number of company-owned stores. In 2019 starbucks has more than 8500 company-owned stores in the USA. How do you explain this difference? Is starbucks bucking the trend of other food-service stores, or is something else going on?Can you please answer this in detail- 1.5 pages length on a word document?Thank you very much in advance.