How is that any different if you want to shop at Amazon, Best Buy, or any retailers online?
When I buy physical goods, I have the goods and I rarely need to care about where it was purchased. If I purchase a disk drive from Amazon, Best Buy, Target or Walmart, it does not have a different set of rules as to how I can use it. It will not have varying rules for how it can track me. Most importantly, it will not matter when I have to replace my device where I purchased the drive that holds the backup.
You'll still need to input your information. Inputting one more is that difficult?
It is not just about adding information, nor is it likely to be just one more. On the Mac, there are hundreds of software vendors who require that software be purchased through their own store. If iOS were to follow the same path it would get the same result.
Every vendor has its own rules for upgrades, maintaining license codes, how easy it is to download new versions, or transfer the software to new devices. On iOS/iPadOS/tvOS/WatchOS, I do not have to do any of that. I can download everything from one place. There is one license and I do not have to keep track of it (the App Store does it for me).
I know that every app that allows social sign on will have to support Sign in with Apple (giving me a simple way of creating and managing accounts and preventing being on someone's mailing list for ever). I know that they will have limits as to what information they can collect and how they can track me. They are required to disclose a privacy label before I even purchase their software on the App Store.
Once there are multiple stores that all goes away. I will not have a choice, as vendors are unlikely to support multiple of them.
Do you hear yourself? Your eco system? You actually think you own this?
The quote was: "my ecosystem of choice", meaning the ecosystem I prefer. Sorry if you were confused by the English.
There are apple customers out there that want options, sorry, you don't speak for all of us.
I do not think I speak for you. I do think that I represent the vast majority of Apple users. The problem I have is that people who share your view have a choice but if you win, the people who share my view would not. You and those who share your view can purchase one a the vast array of Android (or AOSP) phones out there.
If you win, there will be no option for me and those who share my views other than live in the much degraded ecosystem you will have forced on us.