Although Apple has not explicitly printed the end of Connect, it appears that it is the inevitable result at this point. The company has updated its support documents for Apple Music to reflect Linking posts from artists "no longer supported." Seeing that getting artists to share personal posts was one of the main purposes of Connect, there's not much reason to keep the feature.
Apple hyped up Connect as a way for artists to have a more personal relationship with their fans when it launched Apple Music in 201
5, but the feature has fizzled. Most artists have not been active on the platform, and Apple has been pushing out of the limelight for many years. By 2016, the company removed the dedicated Connect from the Apple Music app and relegated posts from artists to the very bottom of the "For You" section, which provides listening recommendations. User-to-use social features like sharing playlists and watching activity probably do not go anywhere, but it seems that 2019 may be the year the social tools for artists in Apple Music Connect finally go the way for iTunes Ping.