I want to add that capital investments required to enter a market aren't usually an absolute requirement to produce the item at all, but just a requirement to be able to do so at a competitive price. You can almost always throw money at the problem and increase production, even if just marginally. For example, iPhone production is probably completely maxed out right now, but if for some reason it was worth a billion dollars to Apple to produce one unit beyond their current capacity, they could come up with a way to build an extra one that didn't involve spending months building a new factory first.
I want to add that capital investments required to enter a market aren't usually an absolute requirement to produce the item at all, but just a requirement to be able to do so at a competitive price. You can almost always throw money at the problem and increase production, even if just marginally. For example, iPhone production is probably completely maxed out right now, but if for some reason it was worth a billion dollars to Apple to produce one unit beyond their current capacity, they could come up with a way to build an extra one that didn't involve spending months building a new factory first.