Philippe, Juan:
Well, the number of pages is also a question. Now it looks like that it is enough for Foundation to look on the quality and/or vitality of the project. Well there is not other way how to evaluate it.
But according my opinion it doesnt say nothing about Wikiversity. It is a good measure of succes for wp (no. of articles), wikt (no. of words), wb (no. of pages of a textbook). But for wv number of educational resources? How educational resource is defined? Lets have a look on Bloom Clock, it can cover 20% of total article count. I.e. there are 6 thousand pages on the project and 2 thousand are botanical items. So thats why number of pages is not good enough to evaluate wv.
And well, thanks to Philippe Beaudette "after many core contributors left" is a better statement.