The Wikimedia Foundation considered it the most challenging technical project to date, while The Economist has called it Wikipedia's most significant change.[1] According to The Daily Dot, Wikimedia Foundation's pursuit of wider participation may risk alienating existing editors.[2] In September 2013, English Wikipedia's VisualEditor was changed from opt-out to opt-in, following user complaints,[7][4] but was returned to being available by default in October 2015 after further development.[9] A 2015 study by the Wikimedia Foundation found that VisualEditor failed to provide the anticipated benefits for new editors.[6]