When it comes to content length, there is no general rule of thumb. But allow me to use the analogy of food (once again). You can think of content as either being a crème brulee or a bag of chips. While both items are enjoyable, they each come with their own set of differences. A crème brulee is a pleasantly sweet small dish for a reason. When you want it, one is often enough. But with a bag of chips, one is often never enough. Content can play that similar role in either case. It all depends on what you can and want to achieve with your content.