What I notice now, as an adult, is just how many techniques Lego employs to increase sales of their sets. The Nexo Knights are five main characters, along with a main villain and a series of henchmen. But of course, it's not possible to simply purchase one massive set and collect all the characters. Even the two biggest sets combined are missing two of the knights, and the major sub-villains are spread out amongst all the smaller sets. While each set comes with at least one opposing member (to create some conflict), anything other than a complete collection of all the sets can easily leave the consumer with a feeling of discontent.
Additionally, Lego has launched a companion, online, game which is powered by real-life "powers" which come packaged in the sets. In other words, if you choose to go online and play the game after only purchasing a single set, you're going to need to purchase quite a few more to get the full effect. And of course, the more expensive sets have all the good stuff.
While these small techniques aren't new, they seem much more amplified than when I was growing up. Sure, we have small sets, large sets, and a number in between, but there was no planned obsolesce or intentionally missing people to order to assure all sets were purchased. You can find the Wizard in the biggest set, but also in a number of little ones. The King was available in over half of the Royal Knights collection. And the Pirate sets, at least the ones with some sort of size, all seemed to come with Captain Redbeard. Now...it's a profit deal. I'm not even mad though...I'm impressed.