One reason for the duopoly is that it cost more to have your app on more platforms. Its a disaster that for example government apps like id only works on the la

One reason for the duopoly is that it cost more to have your app on more platforms. Its a disaster that for example government apps like id only works on the latest ios or android. There are also Sailfish, FirefoxOS, bunch of feature phone OS, and likely a lot I dont know of. The duopoly is self inflicted by the software industry.