These companies aim to dominate markets not by "best product wins" but by "only product wins". So much of the tech markets are winner take most (or all) and if the tech giants can't beat the startups, they try to acquire them (and then often bury them). If they can't acquire them, they try to bury by other means.

This is all fueled by investor money and public market money. Throw tons of money at something and you'll dominate the market, whether or not the product is any good. This is the heart of so many problems in the tech industry and part of why I think we need alternatives to current funding models for tech.