I had done a fair bit of reverse-engineering-jar-files in the pre-LLM era for various reasons. The biggest problem with decompiled java files was naming. The original variable names, class names etc were not retained and the decompiler would use some alphanumeric series. That'd make reading code very hard. Curious how the current LLMs are able to address this. Maybe it's able to figure out how the class, variable etc is used and name it accordingly. (All this is assuming the original code itself was readable because there are enough bad programmers)