When Google first announced sideloading restrictions, somebody told “but we have ADB”, and who disagreed with them was criticized harshly.

Now, I’m waiting for a workaround to enable ADB, so sideloading can be handled now, too.

Android is not more open that iOS for a very long time now. The trend will continue.

Again, this is not a technical problem (the mindset of Google), so technological solutions won’t help.