Currently, it looks like there are 3 columns in a work item card, one for the work item id, one for the _work item name, and one for the estimate.
If the work item id and estimate share a column, it frees up more space for the work item name which is typically a bigger string than the other two combined.
Example illustration:
Currently, it looks like there are 3 columns in a work item card, one for the work item id, one for the _work item name, and one for the estimate. If the work item id and estimate share a column, it frees up more space for the work item name which is typically a bigger string than the other two combined. Example illustration: