Apple’s green message bubbles draw wrath of US attorney general
- RCS and green bubbles in iPhone-to-Android texts play role in Apple/DOJ battle.

https://arstechnica.com/tech-policy/2024/03/apples-green-bubbles-targeted-by-doj-in-lawsuit-over-iphone-monopoly/

This is terrific...and much deserved.

Look, if you have to add extra code to ensure that your app or platform performs worse when interacting with a device or platform you don't own, or additional code/effort is used to prevent the other device/platform from working with yours, you have obviously undermined competition.