Couldn't agree more. PG's definition of "startup" aside, there are plenty of high growth businesses that started at a measured pace, with little or no outside capital, found a market sweet spot, then scaled rapidly (usually with later stage capital)... Maybe they're not startups, but they are highly successful businesses with high impact and wealthy founders. Not easy to do, but perhaps at least as likely to succeed as a classically defined startup (whether tech or non-tech).