How can I understand this sentence?
Please read the paragraphs below at first.
Warby Parker co-founder Neil Blumenthal said he could envision a future with 800 to 1,000 physical stores, while Bonobos founder Andy Dunn said he plans to have 100 stores by 2020.
“As new companies grow, they start to look more like the incumbents,” Mr. Blumenthal said Wednesday evening in a Wall Street Journal interview at an event in New York hosted by consulting firm A.T. Kearney.
My question is: how can I understand the sentence, 'As new companies grow, they start to look more like the incumbents.' ? Thank you for your answer.