In the Disk Browser, it would be really useful if you could search and see results from within all subfolders. So, if you search “string” it would show “String Section.sfz” “STRINGS/01.WAV” etc.
I’ve noticed that the Instrument Presets list has a search bar:
but it’s not very useful for me since it only shows .xrni and .xi files, and it can only search in the Renoise library folders.