Mr. Robot creator, showrunner, and director Sam Esmail has long said that this show was only intended to run for a set amount of seasons, and in planning the fourth season, he realized that the time was right to bring the stories to a natural conclusion.
For another thing, the conclusion of Mr. Robot isn’t a cancellation in the traditional sense of a network giving a show the axe because of low ratings or no longer fitting into the lineup.
Rather than “extend past its inevitable ending,” Esmail and the creative team will end things in the show in their own way that hopefully delivers closure for fans who have stuck around since the very beginning.