[Hammershaft]

An off the cuff idea I haven't really thought through the implications of:

What if these (somewhat arbitrary) product categories were enforced, but instead of preventing different products from integrating, we mandated they be composable over documented APIs?

That way we could get some of the benefits of integration, but without the intensely anti competitive nature of walled garden apps?

[weego]

The net result would be Govt vs Megacorps tied up in a decade of litigation arguing what the terms 'composable' and 'API' mean

[Hammershaft]

As opposed to decades of companies and governments arguing in court what constitutes a monopoly? I mean, composability would just be the intended net result, not a part of the legal framework of the mandate.

I think you could also avoid using the word API entirely. I could see the end result being similiar to how default app selection works in Android.

That said, I still haven't sat down and thought through the unintended side effects.