It all depends on the game though doesnt it. You could argue that some games you buy now and then are constantly getting new content for them, sometimes free of charge. I remember some people on this forum being big fans of Splatoons roll out of maps etc to keep things fresh.
Also I think that if day one patches were possible back then, then you probably would have seen them. I'm sure Perfect Dark devs would have loved to have had the opportunity to go in a fix stuff later.