Lichtman kept sticking to his predictions till the last day. Looks like he was wrong.

Obvious explanation of the mismatch, besides unique factor of incumbent president-candidate’s abdication? Parameters of some keys have been chosen erroneously. I'd smell blemish in overly optimistic estimations of economy (key 5, cf. Sahm rule triggering in August) and in keys from 9th to 12th. YMMV