- Indra was proud about his heritage and sharingan, so much, he started a clan.
- Madara and Izuna were all about protecting their family even if it meant destroying themselves.
- Obito made sure everybody knew he was going to become the first Uchiha Hokage.
- Itachi destroyed the Uchiha and, in the end, hoped Sasuke could've changed them (because after all, it still hurt him)
- Sasuke and his entire character arc was about revenge all his ancestors and family who suffered a lot bedore dying.
- Sarada on the other hand doesn't even bother to know why Sasuke is the last Uchiha.
I really want an explanation on that from Kishi. Considering it is a plot twist, why this revelation is being held back by Kishi? Or is it a plot hole?