Major League Baseball expanded the postseason to 16 teams in 2020, largely because the season was so short (60 games, due to the pandemic) and there was a promise of extra TV money for doing so.
The expanded playoffs proved popular and did provide some compelling baseball, even in the wild-card round. (You can be forgiven as a Cubs fan if you didn’t think their wild-card series vs. the Marlins was “compelling.” I sure didn’t.)
According to Joel Sherman in the New York Post, baseball’s likely going to have expanded playoffs going forward.