I mean? Didnt they kind of explain this idea prior to the games release?
Nintendo made it clear they were going to do continuous updates and games that get that usually recieve the updates very often. I mean the game came out not even 2 months ago and we have had 2 major holiday updates, multiple patch updates, shrub/art update, may day, and we are also having a wedding season/museum day/etc updates added in.
That's a LOT for just under 2 months.
I'm very excited to see how much theyll add in over the next 3 years c:
Also--- to people wondering what happens after the updates theyll likely do one major final update that unlocks a "final" version of each event and some new furniture. That's just how it is.
And even if they stop regular updates they may always add something new down the line just like how splatoon had a "final" splatfest then ended up having another one anyway