It seems abundantly clear that there will be no peaceful/rule-of-law transfer of executive power in January 2029 to anyone but a hand-picked Trump successor that wins an election. A democratic victory (or even a Republican primary winner that isn't appropriately selected) will be resisted at all levels of the executive, and... we'll just see. Whatever the result, the losing party will call it a coup and illegitimate, and such an administration will survive only so long as it can hold control of the government by authoritarian means.
It may even happen earlier. A lot of the kerfuffle around redistricting is being presented to right wing audiences in a way that would be very easy to spin as "cheating". What do we do if democrats win the house next year and Johnson simply refuses to seat the California delegation to keep power? Are we prepared?
Basically, the End of the American Experiment may have already occurred.