Some other discrepancies I have noticed:
Personal access tokens:
Doesn’t support count=true, offset and limit like almost all standard list objects do
Filtering on owner id is possible, but not supported in the standard way using the filters argument, but as a different parameter
There is no GET single PAT API.
Does not support filtering on name in the filters argument.
v3/roles:
Does not offer the delete API (and bulk delete API) which the beta one does. Given that the other role APIs already have a v3 version, I suspect these ones might have been forgotten.
Tasks:
See the following post. It mainly does not support some task-id’s for well known API responses.