When a new tool is announced, there is a lot of casual interest. Hence the 'explosion' in the beginning. After some time, things reach steady-state, and you can

When a new tool is announced, there is a lot of casual interest. Hence the 'explosion' in the beginning. After some time, things reach steady-state, and you can see that Spacy's interest is starting to fall below Core NLP's in the last few weeks. In other words: Spacy is sinking.