A new helper cleans up after a plugin is uninstalled. It removes the options you saved for the plugin and can also delete the plugin's data folder. It reports back:
optionsGone
dataGone
optionsNotGoneBecause, a reason given when the options could not be removed
In this build the cleanup plan is always options-and-folder.
Why
Uninstalling a plugin can remove its settings and data instead of leaving them on disk, and says what it did not manage to remove.
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtThe finding does not say whether any uninstall command already uses this helper.