Every anon with half a brain started reading Q's posts back in October of 2017 knowing that it was an elaborate and existential thought experiment, one that most normies are not capable of running at the level of detail and duration required.
This experiment was ALWAYS going to run for 4 years, or the length of Trumps first term.
It would be complete irresponsible madness to allow the plan to extend across another presidential election, so that is the logical cut off.
The supposed scope of this operation is so vast that it would be a literal miracle if it can be accomplished in 3.5 - 4 years. Any anon that gets emotionally wore out before the first term is up merely lacks the mental fortitude to maintain a detailed and parallel lens on reality for so long.
However, any anon who continues "trusting the plan" after summer 2020 without any actual happenings having occurred by then is a hopeful idiot.