It's easy to get a "head start" effect if you pick the top companies and make a cutoff line just before those companies launched their products. If you include

It's easy to get a "head start" effect if you pick the top companies and make a cutoff line just before those companies launched their products. If you include pre-iphone smartphones and pre-tesla EVs, you'll get the opposite conclusion: Apple and Tesla demonstrated that a head start isn't necessary to surpass competitors and achieve market dominance. By making better technology you can leapfrog companies (like Nokia) that have been around for decades.