Not sure the game has changed a huge amount in recent years.
It's always been a game of earning and burning as quickly as possible. It has always required flexibility in when and where you want to go.
The main change in my opinion is that it has become more ruthless as more people have gotten into the points earning game and therefore you have to be quicker/better at earning and redeeming points than you used to be.
In this way, it is like everything else in life. It is constantly changing in an incremental way, which means you need to keep on top of the game's developments or you'll be left behind.