Interesting that you propose their success is based on the value fulfillment cycle which seems like something I would be far more likely to hear from an mba/pm

Interesting that you propose their success is based on the value fulfillment cycle which seems like something I would be far more likely to hear from an mba/pm than a software engineer. IMO, the answer to why the biggest companies tend to be started by software engineers is far far simpler and something you can find in your ordinary econ 101 textbook. Your standard natural monopoly is one which has high fixed costs and low marginal costs such that the first one to dominate the market can usually sustain that because their ongoing costs are low while any new entrant has to pay down the high fixed costs to enter the market. While usually associated with utilities, software matches that pretty well and software companies tend to be started by software engineers. Writing software (the fixed cost) is extremely expensive as you need to pay a lot to get good engineers and you need a ton of them to handle the complexity associated with the largest markets but once you have written the software, it is relatively cheap to run (the marginal cost). Once one company starts dominating a software market, they can amortize the fixed costs across the greatest number of users and continuously invest to make their software continuously better such that it becomes almost impossible for a competitor to catch up. You can see this today with the cloud as AWS rakes in billions in profits because they have the most features, biggest head start, and most IAAS revenue while the other companies lose billions (5.6 billion for google last year for example) trying to catch up.