Not sure what you mean by “if everyone follows Sony’s example. Sony is the one following, and DRM has been around since old PC games in the 80s.

Denuvo, easy anti-cheat, EA Play and Ubisoft’s platform with forced logins and online requirements, and plenty of other DRM methods have been around long before all this.

If you want to change it, you have to not buy from them entirely, not just do a short partial boycott. They only ever back down if there’s a major cost.