Roadmap WebAppBuilder for 2D-App -- ArcGIS API for JavaScript 3.xx to 4.xx

[GISMountains]

Hey

I use the Web AppBuilder for ArcGIS (Developer Edition) 2.4. This version creates still 2D-application with the "ArcGIS API for JavaScript 3.xx".
How is the roadmap to upgrade to "ArcGIS API for JavaScript 4.xx"?
Would there be an upgrade-path for the developed 2D-application in WebAppBuilder if the interface change to 4.xx?

Cheers

[RobertScheitlin__GISP]

Duplicate of:

https://community.esri.com/thread/192767-roadmap-webappbuilder-for-2d-app-move-from-arcgis-api-for-j...