the stack you're assuming isn't there

"it's the uber for X." you've heard it in a hundred pitches. it's shorthand, a way to skip the explaining. but it smuggles in an assumption that quietly does most of the work, and in a lot of the world, that assumption is just false.

uber didn't only invent a marketplace. it stood on a stack someone else already built: a smartphone in every pocket, a card saved on file, an address that maps to a real place, a bank that settles in seconds, a baseline of trust between strangers and a screen. take any one of those away and the "proven model" stops working, not because the idea is bad, but because the ground it assumed isn't under it.

build for Lagos and Nairobi and also for London, and you can't paper over the gap. the card-on-file isn't universal. the address might be a landmark and a phone call. trust has to be earned inside the product, not borrowed from the rails. you stop designing for the user Silicon Valley imagined and start designing for the one actually holding the phone.

which is harder, and also the entire opportunity. the founders who win in these markets aren't the ones who copy the answer fastest. they're the ones who noticed the question was different, and built the missing layer instead of assuming it.