Device trees are fine and what you would find deeper in an x86 system if you looked. BSP junk is annoying, but you don't have to use it. Just buy hardware that

Device trees are fine and what you would find deeper in an x86 system if you looked. BSP junk is annoying, but you don't have to use it. Just buy hardware that works on mainline Linux. That might mean you have to buy last gen hardware, but so what? A quad core A53 is still fairly fast.