Why? This would be very useful. Is there a technical reason not to alow this? Currently I have a base web part with fields for e.g. headline text, headline type, width on mobile, on tablet, etc.
When the customer needs an additional field in all widgets, I am forced to go through all my Web Parts and change it redundantly multiple times. This is very awful.
Inheritance works fine with Web Parts - why is it not possible to make Widgets from these Web Parts to get this feature for Widgets as well?