It could either break fans' hearts by upholding canon, or it could break canon and tell a different version of Sheldon's early teen years.

Source: https://www.cbr.com/young-sheldon-george-affair-season6/

Sheldon's emotional vow adds to the event's emotionality, considering that he is notoriously known to have an aversion to expressing his feelings.

Source: https://screenrant.com/the-big-bang-theory-show-emotional-moments/

Sheldon's success in his adulthood was largely due to the support of his friends.

Source: https://screenrant.com/young-sheldon-penny-hug-big-bang-theory-better/

While Sheldon's storylines on The Big Bang Theory's spinoff tend to be more comedic than dramatic, Young Sheldon season 6 has put him through a lot.

Source: https://screenrant.com/young-sheldon-season-6-hard-sheldon/