I propose adding a function that allows trimming of chunks that players haven't stayed in for long.
This would be useful for deleting and regenerating unnecessary chunks after updating the server version, allowing players to experience new biomes.

Trim using inhabited time. This was added in 66179d4. You can find documentation on the command arguments here: https://github.com/pop4959/Chunky/wiki/Commands#trim

Note that this isn't currently a released version, you will need to download it from CodeMC or Github Actions.