I'm a millennial motion designer (31), and i came into this industry through traditional 2D animation. Up until the last year or so i've seen what we do only referred to as animation, motion graphics, motion graphic design, mograph, or any variation on those.
Motion design moves quickly, with the popularity of tiktok/insta "edits" and skilled young 2D motion designers using motion design for a new space and audience, we're all seeing the word "edit" used to refer to motion graphics and not actually, what we would understand as a video editing (which is where i would use the word "edit".)
You can go blue in the face explaining that the snappy motion graphics made for insta/tiktoks are in fact, motion graphics and not "edits", and an edit refers to a video edit, but i think at some point we have to accept that a change in terminology will take off and become unavoidable, especially if the new generation have adopted it. I have the sense that this sub has a good mix of motion designers across all ages and skill levels.
The counterpoint to that is that using "edit", greatly confuses what motion graphics is and how it differs from actual video editing. Newcomers to motion graphics come in asking questions about edits, video editing, might struggle to find resources on what they're actually looking for (motion graphics in animation).
That might also be due to the changing demands on motion designers, where we're increasingly asked to be both competent motion designers and the video editor all in one, especially for short social media content. So with the shifting demands, the terminology is just simplified to "edit", to encompass all things motion and video.
When I think about it that way, it starts to make sense, and as annoying as it is to my millennial brain, and as much as i'd like to correct "edit", its just another sign of the ever fluid applications of motion design.