I recently redownloaded an MMORPG that I used to play. The amount of space it takes up has greatly increased. Will MMO's ever take up too much space?

Define, "too much space", please.

Say you have a 500gb hard drive, and the game takes up 20gb. The game increasing in size with every update, where there ever be a point where instead of 20gb it will be lets say, 450gb.