Personally, probably a handful. So not a ton, but I kind of get annoyed
having to back-track through that calendar each time (esp when the
arrows move around due to what I mentioned above) and figured others may
as well.
Customers have used empty panels (collapsed) as section bars, in between
panels that have data & vizs in them. We can certainly think about more
functionality in the future if this doesn't hit the mark though!
Archiving as a duplicate of Use Calculated metrics inside segments ,
because the root of this limitation is not being able to use calculated
metrics in segments.