While Messages and RCS is how Google wants you to message friends, Google Chat also fits that role and the company today reminded us...
tl;dr: after pushing rcs so hard for years, killing hangouts well after forgetting about it, & hiding it from gmail, google now wants you to use its (and google allo's) successor, google chat.
Google’s promotion-pack culture strikes again. You don’t get promoted at Google for “maintaining a successful product and keeping people happy.” You do get promoted for launching a new product, even if it competes with another well-liked Google product.
So if you want to be successful at Google, you launch a new chat service.
Damn that is such a stupid way of doing things too. Eventually user goodwill depletes and you're left with a significant investment in products that don't even generate profit or good.