It took Dell months of effort by a dedicated team  to get all the features of a subset of Dell XPS13 laptops working under Linux. I'm actually considering buying one as a Linux machine, and I already own a Macbook.
To think that an Apple laptop would in any way make a good or even workable Linux machine is laughably naive.
Everything just works with a stock kernel. Only minor caveat is that the wireless card has bad range. But also in Mac OS, so not sure this is a driver fault. Easy to fix, I use an external Atheros from Alfa which has incredible range and is great for pen-testing.
Apart from that, the only annoyance is that the battery does not emit ACPI discharge events. But very few laptops do this, apart from some ThinkPads. (I would love to know which do! These are really useful to set up udev sleep rules instead of polling the battery on a tiling window manager & no-desktop-environment setup, but it is a feature rarely documented.)
I would definitely call my MacBook Pro a good (and workable) Linux machine.
I've also used Windows on a MBP for several months. It's not perfect either, there are minor quirks with that too. MBPs really only work perfectly under OS X for obvious reasons, but it's not usually not implausible to use other OSes on a MacBook if you want to do that.
Additionally, the SD card slot won't work with ultra high speed SD cards, so I have had to cap the sdhci driver to high speed.
So; Yes, there are some hiccups, but I am a happy camper :)
It wouldn't be too much to assume that they support this keyboard controller as well.
If we want to signal to the market that we want laptop with linux we need to support this kind of initiative. The fact that linux just work without any changes is great.
It is the only computer I own that runs GNU/Linux on the metal instead of a VM.
I no longer care for long weekends trying to get something to work.
Linus Torvalds, for one, used a Macbook Air with Linux up until a couple of years ago, which he praised as the right way to do laptops (he now uses a Chromebook IIRC).
(He also used a Mac Pro G5 in the mid-00s, again with Linux, and he wrote his autobiography around 2003-4 on an iBook with OS X).