It would be great if there was an option to add additional fields to ERM titles. One use case would be adding mappings for KBART files as suggested by bug 38911. KBART files from GoKB and other knowledge bases use the COUNTER "feature" of providing additional information and important identifiers as additional columns in KBART. Storing them in Koha would be very beneficial. But additional fields could also be used for a lot of others useful things.