User blog comment:Mira Laime/Introducing long-awaited Discussions updates/@comment-32573398-20190330002205/@comment-20644-20190330032939

We've historically not been very good at growing the number of wiki editors and contributors. Retention (the number of people who use the site once and then stick around) tends to be flat. We think that can be changed.

Setting this as the default landing page for newly registered accounts is a way to see if we can increase the number of people who stick around after registering an account.

If we can do that, then wikis have more contributors.

Worth trying IMO. If it doesn't work we can always remove that setting.