Hey what do you thing about dropping requirement of explicitly specifying lambda parameters completely is they are not used at all? Now

var appNotifications by Delegates.observable(listOf<AppNotification>()) {
    _, _, _ -> notifyDataSetChanged()
}

After

var appNotifications by Delegates.observable(listOf<AppNotification>()) {
    notifyDataSetChanged()
}

Overloading resolution will become ambiguous in some cases, so I don't think it is possible to implement due to the backward compatibility requirement

I don’t see issues with backward compatibility -> old code need to work in new version )witch still will be fine), no other way around

Some old code will work differently (call another method) if those changes are implemented