i think i know why sheldon feels less relevant in the later seasons
to be clear, this is not a dunk on the later seasons, since i love the entire show. however, it is a common complaint to say that sheldon gradually steps away from the spotlight in his own show. the easiest reason to point to is georgie and mandy's relationship, but i think i found a bigger reason. even though sheldon has always had his quirks with some extraordinary things happening to him as a young child, he was always interacting with his family. in the later seasons, he spends time away from family in germany, as well as work on projects with dr sturgis and dr linkletter. by the seventh season, he barely lives in his own home and is usually at east texas tech to avoid the aftermath of the tornado. in the beggining seasons, even if sheldon is doing something extraordinary, his family is by his side, like when he goes to the nasa space center. additionally, everything he did still affected everyone in his family. the later episodes that focus on sheldon dont have this spark because it is about sheldons life outside of his family. this is just an insight i had, and i want to know your thoughts on it.