You are correct, at least every alternate revalidation shall be conducted in an aeroplane.
Looking at App 8, it appears the credit for SE from ME has changed in the latest amendment by the addition of an asterisk, is that a typo I wonder? Previously it said:
Prof check in: SP ME class rating, operated as single-pilot - Credit for: SE class and type rating, and SP ME class, and SP ME non-high performance complex aeroplane type rating