I present you guys ANOTHER possibility that companies could follow to work around the intentions of SKG
It is a 2016 smartphone gacha RPG called Grimms Notes, rereleased in 2018 as Grimms Notes Repage. In 2020, the game's servers were shut down, but the game is still downloadable and playable. "Great" you're probably thinking, but not so fast. By "playable", what that means in practice is that you can still download the game but the only thing that you will have access to is effectively the game's art gallery and the story that was delivered through a visual novel format. The actual gameplay of the title is entirely inaccessible.
To give people an illustration of what that means regarding "bigger" games like the ones this thread concerns itself with, it would be like Ubisoft taking The Crew and patching the game so that, when the servers shut down, the "only" aspect of the game that you could access afterwards is just the game's cutscenes and cinematics.