Just noticed that the explanatory material straight up gives statistical proof that AC has been the main system seller by far:

"The number of consumers who started playing on Nintendo Switch because of this game continued to increase during the first quarter, from April to June 2020. Of all systems in the Nintendo Switch family that were played for the first time during this period, over half were used to play Animal Crossing: New Horizons on the first day."

The numbers are only as of June 30th, so no Paper Mario till the next report.

The report is from April-June and Paper Mario released in July. They could maybe theoretically have brought it up anyways in the explanatory material, but it was never very likely.

Can we rename AC:NH into AC: Blue Ocean?

Damn, huge numbers, AC + pandemic really driven switch sales.
Next quarter AC will become the best selling Switch game

Phenomenal AC numbers. Shipping as many units in second quarter as launch quarter is insane, even if launch quarter only had 10-ish days of release.

And it seems the gaming boost from coronavirus has had an effect on those evergreen titles. BOTW's best non-holiday quarter since Jan-March 2018.

Only checked Odyssey and BOTW but they are both up YoY.

So, I got curious.

I looked up the highest selling, non-holiday quarters for the Wii and DS for comparsion.

DS - 6.98 million (April-June, 2007)
NS - 5.68 million (This quarter)
Wii - 5.43 million (January-March, 2009)

The Switch is an absolute monster.

Minecraft Dungeons has no retail release yet so it's not that one. Minecraft is a slamdunk though.

Just Dance 2020 could be it, or a wildcard - NBA2k20 because it was basically free for a full month. 95% off or whatever it was on the e-shop. 

And for SMM2 ?

At this point, all possibilities should be on the table for Switch predictions. It just keeps defying logic. Who could've predicted Animal Crossing to become such a behemoth.

New and old IPs alike just keep breaking new ground on this system. I'm starting to wonder what the ceiling could be for Metroid Prime 4. Assuming it's the same quality as past games, I'm thinking 5mil+ is a fairly reasonable bar to clear already.

Love seeing more great Xenoblade numbers. So well deserved. Can't wait to see them unveil the new IP they're working on.