Animal Crossing actually lost the top spot this week. It will probably get it back next week though. Really the next few months are going to see Animal Crossing and RFA at the top or near the top with the big game of the week.
Meanwhile Switch sold 78k without any big releases. Is 78k per week the new baseline going forward?
Consoles with supply constraints do not have consistent weekly sales. For Switch specifically, you should expect fluctuations of up to 30k units per week. The most recent week was on the high end, so next week is likely to be lower.
There's also the upcoming Paper Mario and Nintendo's habit of setting more stock aside for a game's launch week, so the next three weeks could all fall into the 40-60k units range, followed by 80k+ for Paper Mario week. It's never easy to predict from week to week, but it seems safe to say that the coming weeks won't show a proper baseline because stock still needs to be sorted out.