Trying to figure out the purpose of new keyframe workflow

First thing uh can we not ALT / OPT click and drag to duplicate keyframes like every other software on earth? I noticed Copy Paste doesn't function properly within the new curves window, and you can't seem to edit values on the keyframe window. So basically you use the inspector to change values and we are supposed to bounce around from three different window panels ? Are there any keyboard shortcuts for any of this?
In 19 I noticed I can ALT drag keyframes but I can't drag a keyframe passed another keyframe. Meaning, if there is a keyframe in front of the keyframe you are duplicating you cannot drag the newly duplicated keyframe after a pre-existing keyframe..
Can someone weigh in on any of these? DVR20 Beta overwrote my 19 install I didn't think it would do that because it's a new version number..
In 19 I noticed I can ALT drag keyframes but I can't drag a keyframe passed another keyframe. Meaning, if there is a keyframe in front of the keyframe you are duplicating you cannot drag the newly duplicated keyframe after a pre-existing keyframe..
Can someone weigh in on any of these? DVR20 Beta overwrote my 19 install I didn't think it would do that because it's a new version number..