Lazy Bird,
For the most part I agree with Rob.

In theory, it should work OK, as you are mainly dealing with environment. I think the most important question (in my view) of how the processor you are after will handle threads. I believe (2?) years ago PGM introduced a change to BIAB that utilizes multi processor threads to generate BIAB tracks at very decent speeds. Night and day compared with previous versions. If that is something you are concerned about, I believe you should inquire with customer service / developers. Perhaps they already tested that multi thread feature with ARM and will give you a definite answer.