samsung have removed the feature 

1 pro mode video recording

2 slide to zoom 

3 no Bixby routines 

4 not provide the support of one UI 2.1 for their older devices 

5 no single tap mode

6 shot suggestion and super steady mode not provide 

7 no provided the live focus mode for dual-lens camera phones 

since Samsung is not providing those feature back which were removed by Samsung intentionally then we should fight back for our rights we have taken phones for the features, not for the removal of the features 

moreover Samsung is halting the update of one UI 2.1 on s9 and note 9 devices in which all the features are available but since samsung is not providing those features back we need to stand and fight for those feature to be back