The Wii U version of Terraria recently received its very last update, which is the final one due to “technical limitations” related to what the hardware is capable of. The patch introduces a new NPC called the Stylist, new mechanics, new items and changes to art and balance. Check out developer 505 Games‘ explanation for why it is the last update on Wii U:
This update is intended to draw a line under Terraria on Wii U as it did with the other platforms – so we are afraid that no further updates for Wii U will be possible due to technical limitations. Bear in mind that you now have the same great content in two hits. There were more updates on the other platforms simply because they were released earlier. The content is the same. The logic for being unable to further update Wii U is, regrettably, the same as the ‘old gen’ machines – though the Wii U does admittedly have more resources than the 360/PS3, it is still a fraction as capable as PS4 and Xbox One, and we need all their available horsepower to take Terraria where we want to go next. This version will still be able to play online, so you can continue to enjoy it as long as you’re gaming on the Wii U platform. By the time the next update rolls out on PS4/Xbox One we’ll be very close to the launch of NX… But let’s not get ahead of ourselves.