While I agree with the idea, reminder folks: Always search for existing feature requests and bump them up with support/more details, as mentioned in the feature request rules.
Duplicate requests are generally ignored, and can lead to the original (and each duplicate) as not being valuable as they don’t see user activity on them.
Here’s a prior ones for this idea that also didn’t adhere to the rule (and therefore likely aren’t seen): Adding comments to variables
Comments in variables editor