Almost all? I doubt it. The C++ ecosystem is too strong. There are many industries like game dev and audio dev where C++ is not going to be replaced any time

Almost all? I doubt it. The C++ ecosystem is too strong. There are many industries like game dev and audio dev where C++ is not going to be replaced any time soon, even for new projects. Also plenty of apps that need high performance crossplatform GUI will probably keep relying on QT. Apps like Da Vinci Resolve or Autodesk Maya.