We really don’t know if R’ Moshe (who wrote his psak about shabbos clocks in 1977 (not specifically for air conditioners) would still say it is a “zilzul shasbbos” issue.
We may not “know”, but nobody here (unless I missed something) has given a valid reason to think it would have changed. The fact that sometimes things do change isn’t a reason to think it changed here, nor is the fact that air conditioning is more common.