What is the limitations of Lookup filter in Salesforce?

There are limitations which I have discussed below as follows:
1. You can’t use special date values, such as “Today” or “This Month,” in lookup filter criteria. 2. You can’t delete fields that are referenced in an active lookup filter.
3. You can’t change the field type of fields referenced by an active lookup filter.
4. You can add up to 10 criteria rows in a lookup filter.