I assume most people just want to keep playing games they paid for forever (I am among those people). Like with older titles where this wasn't an issue. So the solution to mark games that don't do that feels like a half measure, since it doesn't guarantee anything.
Sure, but it would cut off all the excuses about it being too hard or expensive etc. How would companies run PR against such a proposal without making it blatantly obvious even to casuals that they're evil?