From the point of view of IBM, most likely yes, otherwise there wouldn't have been PS/2 and MCA architecture.

Hence why laptops and 2-1 hybrids are basically back to the days of vertical integration of 16 bit computers, whose the PC was the only exception.

So let's all make sure, for apples sake, that is fixed then.

Not really, PC laptops and hybrids are pretty standardized. A slim case doesn't really make it vertical integration.

Try to use anything other than Windows or ChromeOS on such laptops, with 100% support of underlying hardware.

Many of us are? And we can replace parts from third parties.

It is getting more and more integrated though which makes it hard to replace parts. But that has more to do with greed and size requirements than vertical integration, a soldering iron can amend some of that. Driver situation isn't by any means something new or necessarily an indication of vertical integration either.

Looking at my Asus sold with Linux "support" I doubt it, hence why I explicility stated 100%.

As for the rest, nothing that regular consumers would ever bother with.

I don't have any issues, but I did do my research.

We are talking about vertical integration are we not? Don't see how any of that is relevant then.

Which is exactly the proof of how Linux fails at that, by not proving it, thanks for confirming my assertion.

And since you did your research the wider public would appreciate to learn in what consumer shop one can get such out of the box experience.

I don't even know what you are arguing about anymore.