Funny, how in spite of how much Louis knows they both have changed, what remains recognizable. What Louis catches in that brief assessing look Lestat sweeps over the space. He can guess at what Lestat contemplates, finds himself amused by the familiarity of it more so than apprehensive as he once might have been.

He lets it pass. Lestat asked a question, and Louis considers it before doing his own sweep of the space and the mortals within it.

"I want them to keep on living," Louis says. "Untouched by us, and the kind of changes we'd put on them."

In which the Great Conversion™ is one, yes, but there are others. Other ways in which vampires touching human society would change them. Maybe diminish all the things Louis loves so much about humanity, still loves even after all this time away.