Things have been spotty since well before the touchbar. I doubt anyone is running Linux reliably on any Macbook built after like 2014. There are still open issues with keyboard, touchpad, display drivers, brightness, sleep, nvme and lots more.
Yep. In 2018 I tried to run Linux on a 2016 MacBook Pro, and it was a pain. The keyboard/touchpad weren't supported without an out-of-tree driver, and audio and suspend-to-RAM didn't work at all. I hear things are better with that model now (I gave up in 2019 and got a Dell XPS13): keyboard/touchpad driver has been upstreamed and I believe there are patches to get audio working, but I don't know about suspend.
