Just talking about PC level here is missing the point. A group that just discovered gaming can move from level 1 to level 30 in one, two years of play, and sure, they'll get a lot more experienced as players along the way. But that doesn't mean they have seen everything that there is in the game. Because the cycle begins anew: New campaign, new characters...
What we should rather talk about is how the game can be as challenging and interesting with your fifteenth character as it was with your first.
At the start, gaming is about figuring out the rules, both the explicit ones (roll a d20, add this modifier) and the implicit ones (don't split the party). I think the real learning process is not the rules themselves, but all the possibilities of the game. The different play styles. All the different settings. How to work together as a group. How to make a character that is efficient in overcoming challenges and interesting to play as a personality. The great thing about RPGs is how much depth really is in the game, even though it's hard to explain it all in a rule book.
The first-level characters of a group of seasoned veterans will take on very different and more complex challenges than a group of 30-level beginners, and that has nothing to do with the numbers on their character sheets.
What we should rather talk about is how the game can be as challenging and interesting with your fifteenth character as it was with your first.
At the start, gaming is about figuring out the rules, both the explicit ones (roll a d20, add this modifier) and the implicit ones (don't split the party). I think the real learning process is not the rules themselves, but all the possibilities of the game. The different play styles. All the different settings. How to work together as a group. How to make a character that is efficient in overcoming challenges and interesting to play as a personality. The great thing about RPGs is how much depth really is in the game, even though it's hard to explain it all in a rule book.
The first-level characters of a group of seasoned veterans will take on very different and more complex challenges than a group of 30-level beginners, and that has nothing to do with the numbers on their character sheets.