"The Miiverse service has ended.— Shiny Quagsire (@ShinyQuagsire) July 18, 2017
Miiverse and any software features
that make use of Miiverse are now
Apparently the line of text above was added as part of the latest Wii U firmware update. The service hasn't ended yet, but it's clear Nintendo is going to make the move fairly soon. A wonderful Wii U feature we'll certainly be sad to go. Thanks to T27Duck for hte heads up.