I get near parity on design on all platforms yet keep full native speed on mobile.
The main issue with old widget system is how hard is to theme them, and theming is, I think, a major driver of the use of HTML/CSS (certainly on my business customers, where they demand the UI be colorized with their corporate stuff!).
Fix that (like with SwiftUI) and suddenly using native is more doable (bussines-wise).
Combining with server-driven architecture, so far my eCommerce app with 3 dozens of screens is made with 2 files of SwiftUI (app specific, plus a one-time cost in build the boilerplate), very doable to a solo guy to code all in 3 platforms.
>> wxWidgets licence is a modified version of LGPL explicitly allowing not distributing the sources of an application using the library even in the case of static linking.
For some app distribution channels, like with iOS apps, that can be difficult to impossible to actually implement given the control Apple has over app packaging and distribution.
Otherwise, you should be able to distribute a commercial non-LGPL app that uses an LGPL library just fine as long as you meet that stipulation.
As others have pointed out, WxWidgets ships with a modified LGPL license that makes this point moot, anyway, and makes it easier for commercial apps to comply with the modified license compared to the bare LGPL as they are free to statically link WxWidgets and distribute apps in compliance with the modified license.
You theoretically can.
You also have to offer them source code, or just ship it along with.
I wish more people used it instead of writing "apps" that are just a giant web browser with javascript and a hack to get menus working correctly, with fake UI widgets that don't respond like native window controls (no proper tab navigation, no moveable or resizeable dialogs, keyboard accelerators don't work).