Again, your suggestion will lead to a lack of experienced, knowledgeable players in the 20-24 range, which will lead to a wider gap between the haves and have-nots. If everyone who knows and has run the 20-24 quests gets an automatic free pass to 25 as soon as they hit 20, then all of those players will have no reason to run the 20-24 content ever again. From a developer perspective, this is also a bad idea, as all that content you spent time developing will only ever be seen a few times per character, rather than a few times per life. For me at least, this would be very discouraging when it came time to develop new content.