When Kylo Ren says to his father: [Han Solo. I’ve been waiting for this day for a long time] some of you might argue that this quote is clumsy fan service, because Vader said that to Obi-Wan.
Did Vader say that?
I think you mean “I’ve been waiting for you Obi-Wan, we meet again at last.”
Similar but different enough. I wouldn’t consider it fan service though, maybe an echo or a soft reference to the earlier duel.
This is actually the first time I’ve associated those two lines as having some kind of relationship to be honest.
It aren’t exactly the same words, but Kylos phrase definitely mirrored Vaders phrase.