There are really a lot of responses to this which explain it well. The summary though might be phrased as 'alignment'. Specifically, when everyone from the mainboard engineer to the product marketeer for the product have the same goals and priorities (are aligned) the overall system reflects that. In x86 land the processor guys are always trying to 'capture more addressable market' which means features for specific things which perhaps have no value to your 'laptop' but are great for cars embedding the chip. Similarly for display manufacturers who want standards that work for everyone even if they aren't precisely what everyone wants. Need a special 'sleep the pixels that are turned off' mode for your screen ASIC which isn't part of the HDMI spec? Nah we're not gonna do that because who would use it? But Apple can, specific things in the screen that minimize power that the OS can talk to through 'side channels' that aren't part of any standard? Sure they can do that too. And if everyone is aligned on long battery life (for example) that happens. I worked at both Google and Netapp and both of them bought enough hard drives that they could demand and get specific drive firmware that did things to make their systems run better. Their software knew about the specific firmware and exploited it. They 'aligned' their vendors with their system objectives which they could do because of their volume purchases.

In the x86 laptop space the 'big' vendors like Dell, HP, Asus, Lenovo, Etc. Can do that sort of thing. Framework doesn't have the leverage yet. Linux is an issue too because that community isn't aligned either.

Alignment is facilitated by mutual self interest, vendors align because they want your business, etc. The x86 laptop industry has a very wide set of customer requirements, which is also challenging (need lots of different kinds of laptops for different needs).

The experience is especially acute when one's requirements for a piece of equipment have strayed from the 'mass market' needs so the products offered are less and less aligned with your needs. I feel this acutely as laptops move from being a programming tool to being an applications product delivery tool.