I would like to develop Ghidra API Python scripts with the ability to discover the API through automatic code completion; both in Ghidrathon's REPL, and, preferably, also when using an external IDE. I am extremely enthusiastic about Ghidrathon, but without the ability to leverage code completion / content assist features, I would still chose Java over Python because the integration with Eclipse works well and feels indispensable when dealing with Ghidra's massively nested API.

Notably, code completion in Eclipse is essentially the only appealing feature of Java here. I would vastly prefer to develop in Python due to the rich ecosystem of libraries and the fact that other toolchains (IDA Pro, Binary Ninja) also use Python as their main driver for plugins and scripts.