Back when Starbucks first exploded to such ludicrous levels that you'd sometimes find two of them sharing a single parking lot, the expectation became that there would always be a Starbucks nearby. So much so that when I tried to drive from Phoenix to Los Angeles early one morning, I was surprised, then baffled, then amazed, then outraged that there was no Starbucks at all on I-10. I spent nearly 4 hours driving with…
Starbucks' expansion was interestingly "clumpy". Not surprising, I guess, when you realize they have to deal with the same supply chain issues as anyone else in a similar space. They didn't open a freestanding store in Tulsa until 2002, years after seemingly every other corner in Manhattan had one.
You'd think that two Starbucks across the street would cannibalize each other, but you'd be betting against very smart people who have made this their lifes' work and been richly rewarded for succeeding at it.
Source: anecdata from my father, who works in commercial real estate and thinks they (and Walgreens) are the two savviest businesses he's ever worked with in his industry.
P.S. A software solution to turn any arbitrary firm into Starbucks would be worth tens of millions of dollars if you sold it correctly. Billions if you went the next step and started flipping properties based on the software. (e.g. "101 Main St. on foreclosure auction for 200k, predicted value to a banking customer is 1.2 million, expected cost to work deal is 200k. Placing bid now.")