Do the impossible and create new tags and retroactively apply them to all historic conversations. Never be out of date by creating new tags with changes in business context.
Humans are terrible at tagging - Index is near perfect with 99.X% accuracy with a granularity that’s impossible for humans. Once the data’s right everything else is easier.
Don’t be limited by the constraint of tags. Index’s Semantic search allows you to query using plain English and return all related conversations. New tags can be created and retroactively applied.