Overall I feel it is just the pulse of time, just like with losing languages that are not being used, but this part from the article caught me unprepared:

A newspaper in Toronto recorded the lament of a pastry instructor who realised that many of his culinary students couldn’t properly pipe an inscription in icing on a cake – their cursive writing was too shaky and indistinct to begin with.

Not that I feel writing on cakes is essential either but there is more to writing than meets the eye, I suppose.