Master and Challenger have to play an average of 1 game PER DAY to prevent decay!
This is completely stupid for casual Master and Challenger, this has nothing to do with skill. I am Master and I don't have the time to play a game per day while studying.
Previously you only had to play 1 game per week which was perfectly fine.
Let's say a game lasts 30min and to stay Master the whole season you had to play 365 games - about 180h! (only playing, no queue waiting, no champion select, ...)