Hi!
the conditional visibility of sections has the great ability to allow a true/false selection. This is very convenient as it allows to use the same variable in multiple occasions.
Unfortunately Buttons conditional visibility configuration is always conditioned to the FALSE state of the variable.
It is not ultimately crucial, but would streamline the UX and give us less need to create duplicate variables “XYZ visible - inversed” e.g. for toggle buttons (I know there is a workaround to use tabs, but that forces you to always create hidden dummy sections so that the tabs widget appears nicely color coded 
).