. I don't really buy this as a generational divide: I think people in the 70s could rely on their character sheets, and I think people now can get creative.
Generations are a huge part of this, with also adding in where you live country vs city and how active you are in life.
What I do think is that the degree to which a game (and by game, I mean the thing happening at a particular table, not an edition) can be about "player skill" is entirely a function of the GM's willingness to present his "puzzles" in good faith. unfortunately, in my experience, what you actually get more often than not is a GM-May-I? situation in which the GM wants the players to read his mind and speak the precise words, rather than coming up with a novel solution.
When you go Beyond the Game Rules, things can get spicy.
What's the difference between "Skilled Play” and "Metagaming"?
There is not. Bad Players give this false impression.
I see three types of skilled play:
1.Game skill and mastery. You have read and understand the rules. You know exactly when to and how to use the rules. You are a good mechanical player.
2.Is still using the mechanical game rules, like above, but with the added twist of Game World Immersion. This is something like attacking some orcs at a tavern by the front door, while using a Wall of Ice to block the windows and back door, tapping the orcs in the tavern.
3.This is going beyond the rules, often, but not always 100%. As I have been known to say "just flick that silly rule book on the floor and Role Play(the acting kind)."
While #1 mostly follows the official game rules, #2 and #3 depend 100% on the GM's whims. And flat out, many DM will refuse to ever do #3 as they demand any game related action must use the game rules.
A huge number of DMs, Casual DMs and all the DMs that don't want to put much work into the game are a lot of them, keep the game world vague. The PCs are just in a "castle" or a "forest" and the players are left to imagine whatever they think it is like. With a vague world, it can be hard, even impossible to do #2 as they don't know the description of the game world.