

It was Apple. Or rather, regulators and partnering companies leaning on Apple to manage the content on their app store better, including the content that you could find via those apps.
Could say something about how the app stores are a monopoly power, and the chilling effect these wide ranging and heavy handed content policies have, and why the open web (and web apps) are a better option. But we also handed the web over to Google anyway, so it’s not that much better.
Yeah, junctions would be most similar to a mount point. Though you can also mount one directory under another, so it’s more like a directory hardlink in that case.
And symlinks were actually introduced in Vista, but for some reason you needed to be an Admin to create one. With Win10 they removed that restriction, but for some reason kept it behind a “developer mode” anyway, it’s strange.