When using '!' to insert a file or image, there is no wildcard support on the file suggestion search. This means that large data sets have to be reversed:
e.g.
Logical Hierarchy:
container_category_filename.png
Optimal Suggestion Search:
filename_category_container.png

In addition to that, the wildcard search for Open File Library > Search on Other Pages is not very robust and always produces incomplete results.
1. Create a group (10) of files in a file repository on a space
2. Name them container_category_filename01.png 02,03 etc
3. Type '!'
4. Open Search
5. Type category or filename
6. Observe that some but not all images appear
7. The optimal search with wildcard here would be r_c or y_f. Neither of which is possible.