Google: "While we support many of the DMA's ambitions around consumer choice and interoperability, the new rules involve difficult trade-offs, and we're concerned that some of these rules will reduce the choices available to people and businesses in Europe."
Apple: “The changes we’re announcing today comply with the Digital Markets Act’s requirements in the European Union, while helping to protect EU users from the unavoidable increased privacy and security threats this regulation brings."
Android and Windows have lived in the chaos of open platforms so much that they can shrug off most of these regulations. Apple's entire business model is being a walled garden.