> which is ARM under it all so you would think they already have experience in that area. I think you are probably still incorrectly assuming that the CPU arch

> which is ARM under it all so you would think they already have experience in that area. I think you are probably still incorrectly assuming that the CPU architecture and instruction set have any relevance. What you've described sounds like the kind of software that is a portability challenge due to being tied to specific operating systems and their particular APIs for interacting with peripherals. It doesn't sound like anything that should much more than a recompile to target a new CPU architecture, provided that the application has already been ported to the operating system that will be used on that architecture. Certainly nothing you've described would require hand-tuned assembly code to reach adequate performance on a decade-old laptop.