Globally, iMessage is way down the pecking order; the rest of the World uses, in order, WhatsApp, WeChat, Facebook Messenger, Telegram and Snapchat. Google are bitter because it cannot get a decent service to compete despite having 70% of the global market and despite so many different attempts, which is largely down to their institutional ADHD and confused product strategy. Their claim that iMessage is a "core" service under the DMA is laughable and spiteful. If they give a crap, they ought to be going after Meta, which has by far and away the most significant part of the European messaging marketplace.