If you time jump, though, your store will not upgrade to the largest store (which is only one up from Nook's Cranny'). I couldn't figure out why my store has stayed the same, even though I've been on more than 30 days since it upgraded, spent over 200,000 bells and had Label a bunch of times. Then someone mentioned that. You need to play 30 days straight without time jumping.
@emmahsue I was just thinking the same thing. He mentions getting a mystery package, then doesn't update everyone on what it is!
@cobalt I have the ACNH Switch, as well. Got it for Christmas last year, but never set it up because I hate the Lite and was playing that. Then moved, so finally set up the Switch. And I was playing Legend of Zelda: Skyward Sword on the Lite and having trouble reading the text. Didn't realize how much stuff I was missing until I actually started playing on a big TV.
Legend of Zelda: Breath of the Wild is another good one if people haven't played it. Plus, there's a second game coming out next year.