Can confirm this. I'm typing this on a System76 galago pro, which is more than 2 years old at this point. Over time, I've seen the very same issues which you'd expect from any other system: bluetooth misbehaving, graphics issues etc.

In particular:

1. The graphic card (Intel onboard Crystal Eye) switches to low-power mode on battery. The windows Intel driver has an option to switch it to performance mode. No such option on the linux drivers.

2. The damn Xf86Display Key (Projector shortcut) isn't supported.

However, I've realized over time that irrespective of your choice, you will face issues on _your device_. NTFS would stop working on your Mac, or your iPhone will refuse to connect to your Car's bluetooth one fine day.

(/rant)