Apple got out of the server game long before they adopted aarch64, so that's a trillion worth of server hardware they never would have sold anyway. And probably not actually a trillion.
USD starts sounding more and more like meaningless tokens. Billion here, trillion there. I still have 100 trillion Zimbabwean dollars somewhere.
Apple was the only one stopping themselves from getting back in. It's not like the Mac is a trillion-dollar market segment to begin with.