Hey kids, magical realism!
I definitely think there is a thread of these sort of series weaving through not just this decade, but the history of anime & manga. However I do think that in this decade we started seeing quieter, less OTT series like this one emerge, both in this genre and others (a lot of the space flight themed shows of 2003 strike me as having a similar sensibility).
That being said, I like my cartoons loud and cartoony, so I’ve not seen this.
I did catch some of the second Someday’s Dreamers series due to who the director is and it takes the realism part of magical realism even further, particularly in the actual animation. Whereas this looks like bog-standard anime in its presentation.
But more on that much later.