This question already has an answer here:
Communities need to pass some critical mass and quality criteria in order to come out of Area51 into StackExchange proper, and be "born". But do sites ever "die" ?
Put another way - is the number of StackExchange sites over time strictly a monotonically increasing function ?
A simple "yes/no" answer would be fantastic, but if this generates discussion, I'm all the happier.
Note : I'm explicitly referring to sites that have already exited Area51 and public beta.
Graduation, site closure, and a clearer outlook on the health of SE sites does not seem to answer my question.