Why would they get rid of the option to remove it? What would they get from it?

Seeing as you have to set up which model you’re using from an external service and the browser is just making it easier for you to use that external service, probably forever

It’s Mozilla so if it leaves the main menus it will probably be in about:config. They’re annoying in how much boat they’re adding to Firefox but most stuff is still opt out: password manager, profiles, tracking, etc…