[KeplerBoy]

Having a humongous game might be a competitive advantage in the era of live-service games.

Users might be more hesitant to switch to another game if it means uninstalling yours and reinstalling is a big pain in the backside due to long download times.

[mitthrowaway2]

More likely once they uninstall it, they never reinstall it because they'd have to clear out so much other stuff to fit it back in.

[KeplerBoy]

I guess it's a lock-in effect of sorts.