It's a small European town, with a University and a few other higher schools.
The houses in some parts of town were split in smaller and smaller units to maximise the rent profit (split one 2 1/2 flat worth 1'400 p/m and rent two single room flats for 900 each...).
The results is that Anna from the article would have found a shady cheaper flat and would be very happy with it (well, it's a bit expensive but it's mine!). But the spreading of micro apartments will also make her very unhappy for the rest of her life (the life before the first five years in her working career and the long years after that!).
She will come back and ask why there are no flats of reasonable size, for a reasonable price! She will state that not everybody is a twenty-something, who is almost never at home and only needs a bed to rest after yesterday evening party!
My stance: micro apartments are a need, but you probably don't want too many of them in town center. You need a good mix there and the twenty-something are not the ones who pay taxes nor the ones that build a solid social life.