The biggest gripe I have with Lego's creation of the 18+ tag is that the age suggestion now has more to do with who lego thinks will enjoy a set, rather than who is capable of building the set. Fans know what they can build, so the age suggestion in my mind was for parents who knew what properties their children enjoyed, but didnt know what their kids were capable of building. I still think that is the case for the other age ranges, but for 18+, I guess lego now thinks adults need to be told what is ok for them to buy. This is most apparent with the BTS set (<a href="https://www.lego.com/en-us/search?q=Bts" rel="nofollow">https://www.lego.com/en-us/search?q=Bts</a>), an 18+ set with simple building techniques targeting a brand mostly enjoyed by teenagers. Compare this to the Airbus heli (<a href="https://www.lego.com/en-us/product/airbus-h175-rescue-helicopter-42145" rel="nofollow">https://www.lego.com/en-us/product/airbus-h175-rescue-helico...</a>) which is more aptly labelled at 11+ while having twice as many pieces and being a technic build.