We only got PCs because IBM screwed up. Every other ecosystem is walled off to various degrees. And absolutely every current corp knows about IBMs failure and definitely does not want to repeat it.

Nintendo? Walled garden. Playstation? Walled garden. Mac/iOS? Walled garden? Clouds? Obviously walled gardens, the higher the walls the more advanced the services. SaaS? Walled gardens. Social media? Walled gardens.