If the author is on, I'm curious why he chose wxWidgets instead of Qt; I'd be surprised if it is that much lighter weight than Qt. (I even wrote my own cross-platform toolkit with "more lightweight" as one of the reasons, and if you use all the features, it weighs in about the same size as Qt, I think.) Also, the last time I used wxWidgets, many years ago, it had a clunky MFC style to it, limited feature, along with a rather Windowsy look and feel. Have those things changed?
My experience with wxWidgets based apps is that they tend to not handle DPI scaling well. Audacity is a good example, IIRC that's one of the reasons they're moving to Qt.