@kde Although I am not a fan of KDE I believe that taking proprietary APIs and SDKs and making extensions under extreme copyleft licenses is a good strategy and that KDE was one of the main reasons that QT is released as free software. The KDE frameworks should be licensed under the AGPL v3 or later so that anyone who uses them with proprietary QT modules must release them as free software. Something similar could be used for Apple's Swift programming language, Microsoft's Visual C++ Redistributable, AMD's AOCC, the Oracle Database, Microsoft's DotNet Framework 4.8.1 Devpack, the Unity and Unreal game engines, Google Play Services and other proprietary software. It is time we use embrace extend extinguish against the companies that pioneered the strategy in the cause of software freedom.