I wouldn't say the pairing's behind us... (Sp recently released a acrylic of sakura confessing to naruto) Yes some people watch boruto but many people don't like the sequel series much like people don't like the new star wars... Will disney do something to make amends for their actions? It might be unlikely. Or look at the way ash's story in pokemon ended. Many things not addressed and ash never even meets his dad. But it doesn't matter enough it seems. I still wouldn't claim all of ash's fans put the series behind them. Sakura was also a lot higher than hinata in the recent poll (higher than naruto and sasuke even). Sakura vs chiyo also won the fight poll as well.... Kishimoto was likely copying the love triangle in dragon quest: the adventure of dai but probably didn't do a great job but even so i don't think sakura was hated to a huge extent. There are youtubers nowadays who openly say sakura and naruto should've been together so at least some fans know it should've happened
I think that the love triangle in Naruto resembles more the one in Slam Dunk, but without the sensational declaration from the protagonist.
This ending will only change if the author wants, but it seems that he no longer cares about his work and just wants to rest while it makes money for him.