Real competition involves more than duopoly. Unfortunately, in tech, duopoly is generally erroneously seen as quality competition. Search. Phones. Operating systems. GPUs. CPUs. Consoles. Et cetera.See? This is why completion is great. The rumor that Navi is going to be great has the consumer winning with better performance and lower prices.
Cartels are the worst. Monopolies are second. Duopolies are third. None qualify as high-quality competition.
This is perhaps a symptom of Economics not being a required part of the K-12 curriculum.