We all have used Wikipedia at some point in our life, if not constantly. A recent study has found that the number of editors on Wikipedia has been falling. Some claim the reason to be the rules for quality control implemented back in 2007. However, others argue that Wikipedia now covers almost everything and there is less and less new things to add to it.
I am not quite sure which of these could be the reason in my opinion, but they both make sense. The following graph shows the decline in number of editors over time: