The Big Bang Theory season 13 could have properly addressed Penny and Leonard's conflicting thoughts about having children, gradually showing that Penny was becoming open to the idea. In the show's final season, the pregnancy reveal felt unearned and forced, with varying fan opinions on Penny's sudden change of heart. However, season 12 spent too much time on Sheldon and Amy's Nobel Prize win, leaving little room for other characters' development. The show ultimately ended due to Jim Parsons not renewing his contract, leading to an unsatisfying conclusion for some storylines.
