It appears Samsung already has grand plans for the future of the Galaxy F foldable flagship. A report from the South Korean Yonhap News Agency has stated that the tech giant intends to keep releasing new foldable phones each year in selected markets. This will be alongside the usual yearly updates to the Galaxy S series and the Galaxy Note series.
https://www.notebookcheck.net/Samsung-to-release-annual-foldable-line-up.361101.0.html
Samsung and friends should provide security updates for existing devices instead of coming out with useless features.