outdatedsoftwarephobia
The fear or condescension of programs and other operating information used by a computer which are not kept up to date, especially if the updates are freely accessible for the hardware currently in possession. From the Greek "phobos" meaning fear and the English "outdated" and "software" meaning outdated and software respectively.
Why are you still on macOS Sierra when High Sierra is fully baked‽ You trigger my outdatedsoftwarephobia!