I think there is a constant shift towards different kind of startups, as one field saturates and big players emerge. Currently the shift has been from "easy" to

I think there is a constant shift towards different kind of startups, as one field saturates and big players emerge. Currently the shift has been from "easy" towards "harder". in the early 2010s there was a shift from viral consumer services and apps towards b2b services and Uber-style marketplaces, which both are arguably harder to make than most consumer apps, and now there is a shift towards hard tech startups, which, again are harder to build. But startups were more about hard tech in 80s, early 90s. It will take a while that new big consumer tech platforms emerge, but when it happens, then again there will be shift towards viral consumer services.