Nothing works out of the box with Linux. They may "seem" to work out of the box but you realize how many little tweaks go into making a laptop/consumer device work fully when you work as an embedded dev. It is quite difficult to get to the same power consumption levels and same exact hardware / software driver capabilities under Linux. There are simply no APIs for many things. So the entire driver has to live in userspace using some ioctls to write random stuff to memory or it cannot exist. There are also algorithms that the hardware manufacturer wants to keep closed.
Note that NVIDIA drivers didn't get better since they are more open source now. They are not. GPUs are now entire independent computers with their own little operating system. Some significant parts of the driver now runs under that computer.
Yes the manufacturers may allocate some people to deal with it and the corrosiveness of the kernel community. But why? Intel and AMD uses that as a marketing and sales stragtegy. If the hardware manufacturer is the best one there is, where is the profit for supporting Linux? Even Thinkpads don't have 100% support of all the little sensors and PMICs.
HiDPI issue hasn't been solved yet completely. Bluetooth is still quite unreliable. MIPI support should be the best due to the number of devices, until you realize everybody did their own shitty external driver and there are no common good drivers for MIPI cameras so your webcam doesn't work. USB stack is still dodgy. Microsoft in 90s had a cart of random hardware populating the USB tree completely and they just fucked with the NT kernel plugging and unplugging until it didn't break anymore for love's sake. Who did that level of testing with Linux?
Then you cannot claim that Linux works out of the box. It doesn't if you need to select hardware for it. However, I already know that since I actually used Linux for 15 years. Both on the consumer side as a normal user for 15 years and now I am actually an embedded Linux developer. The underlying architecture of GNU/Linux distros is heavily server biased which often is the polar opposite of a consumer system.
Except for Apple (and maybe Framework), all laptops are designed by contract original design manufacturers (ODMs) Taiwan, Korea and China. Your usual Linux laptop OEMs like System76 and Tuxedo just buy better combinations of the whitelabel stuff. They are inferior to actual big OEMs designs which contain more sophisticated sensors and power management and extra UEFI features. This includes business laptops Dell Latitudes, HP Elitebooks and Lenovo Thinkpads. None of those manufacturers actually do Linux-based driver development. All the device development, manufacturing and testing is done under Windows and only for Windows. The laptops are booted with Windows to do functional tests at factory not Linux.
Linux is an afterthought for all OEMs. After Windows parts are released and tested, the kernel changes to Linux is added. They are rudimentary support which doesn't include 100% of the featureset. Many drivers today have quite proprietary user-space side. You'll get none of that from any laptop manufacturer. You may say you don't care about those and you're okay with 10 - 20% power loss. That's not the definition of out-of-the box for me.
Note that NVIDIA drivers didn't get better since they are more open source now. They are not. GPUs are now entire independent computers with their own little operating system. Some significant parts of the driver now runs under that computer.
Yes the manufacturers may allocate some people to deal with it and the corrosiveness of the kernel community. But why? Intel and AMD uses that as a marketing and sales stragtegy. If the hardware manufacturer is the best one there is, where is the profit for supporting Linux? Even Thinkpads don't have 100% support of all the little sensors and PMICs.
HiDPI issue hasn't been solved yet completely. Bluetooth is still quite unreliable. MIPI support should be the best due to the number of devices, until you realize everybody did their own shitty external driver and there are no common good drivers for MIPI cameras so your webcam doesn't work. USB stack is still dodgy. Microsoft in 90s had a cart of random hardware populating the USB tree completely and they just fucked with the NT kernel plugging and unplugging until it didn't break anymore for love's sake. Who did that level of testing with Linux?