The gameplay has changed over there years, but it's basketball. The real game hasn't really changed that much over the years. NBA Live's existence has had very little impact on NBA 2K's development. Someone mentioned the online modes. I mentioned earlier that 2KSports may have stolen the shot meter by the hand from them. After those items, what have NBA Live done to make 2KSports even acknowledge that they exist? I swear I read somewhere that NBA Live 19 didn't even break 100K in sales.
EDIT: I can't find the article, but I know it was some crazy low number.