Are you aware that Apple hardware pre-2015 was much more open than it is today? I agree with your sentiment for modern Macs, and that's why I'm trying to find a suitable OS for switching.
When there's a limited scope of what drivers are required, it should be easier, not harder, to support certain hardware. Being unable to read NVME drives (which have been around since 2011) is no longer acceptable for an OS in 2020.