We have used text based variables to allow users to select from multiple metrics to see in a single card. This can be very powerful when combined with the recent beast mode within a beast mode feature but one downside is that consolidating cards into one removes one of the benefits of a higher number of cards which is that you can use each card to draw the users attention to specific things to focus on in the data.
If we were able to have certain variable options on a secondary variable become highlighted in green (or another color to draw attention) when a certain option is selected on a primary variable we could give the user the same benefit of guiding their attention while still having the benefits of all the information being displayed in a more compact package. On a high level it is really just allowing data creators to highlight optimal variable combinations.
