this may be a generalisation, but is it that the new thing is within the autistic person's field of interest so it's not a new change, but legitimate continued research?
I'm not so change averse as surprise averse. The things I do habitually are because they work for me and I have no further need to think about them. Of something gets in the way of the habits i need to start thinking about it again, and that is annoying. In my field however I'm highly creative and take every opportunity to explore new ideas.
I am also very tolerant of lack of change, I an for example east the same lunch every day for years without a problem.
I think almost anyone can accept of change, as much as anyone can be against it. It just needs to be managed appropriately and at the correct rate.