Best Automatic Sugarcane Farm — Java 1.16-1.21

Shulkercraft sugarcane farm is basically the first thing I build in every new world. The observer design is dead simple and it just works forever without any maintenance.

Quick question — does this still work correctly on Java 1.21.4? I saw a comment somewhere mentioning observer behaviour might have changed.

Built this on my Hermitcraft-style server world. We now have so much paper that trading with librarian villagers has become our main emerald source. The paper economy is completely broken in the best way.

Running this on my survival world for over a year now. Zero issues, zero maintenance. Best farm tutorial per hour of effort invested. Build it on day one.