I am going to state the obvious, but making video update takes time so the time they spend making an update is time they don't spend working on the game. My point is, what is the point of making update just to make updates...? it is just a waste of time so a waste of money.
In addition to Elwyn post, you can check the steam page of the game, you have sometimes small updates too so you can have a look on what the Larian's teams are doing
