You are underestimating how many people will give up at the slightest inconvenience.
I can tell you, when vigorously enforced, you can get the vast majority of a population to play within your walled garden (China, as an example).
Sweden however, yeah, unless they wanna go full internet firewall, not sure exactly how they plan on enforcing this.
Friendship ended with Firefox. Waterfox is my new best friend ❤️