Visual (and audio?) feedback on copy to clipboard (CTRL+C)

[ls-1N]

Problem

So some users (especially those coming over from MS Windows) are not confident CTRL+C always does anything, so they will resort to workaround like copying multiple times or spend extra cognitive effort and time verifying what they pasted is what they actually wanted to paste (e.g. before sending it).

• I heard a mention of it in a YT video about memes.
• And then it came up AGAIN in another loud YT video (of Windows users) in the same day. (I swear I didn't watch that many videos today 😂). The videos have some comments about that as well.
• Here's some users on StackExchange talking about getting some UI feedback on copy on Windows
• And there is a clear (niche?) desire for it also on Linux
• Also users wondering why they CTRL+C multiple times

It is not a big problem, but it is real one.

Besides, more clarity and feedback to user's actions, sounds like a positive to me.

If this doesn't sound reasonable as a default feature - that's fine by me. I just wanted to give an hour or two to make a case for it, since I found no tickets about it.

Proposal

A visual cue would be nice. Perhaps also an audio cue (opt-in - if the notification system is user configurable like that).

1. The visual cue could either be a simple notification - preferably also showing the text or media that was copied. This should ideally be similar (so as to be more intuitively understandable) to whatever solution will get used for the screenshot feedback (discussed at Better post-screenshot animation #1661).
2. An even more intuitive (and effortful to implement) method would be to show the visual feedback right at the point of the selected text/image/file.
   a) This could perhaps be a brief visual copy expanding and fading out. Since the original remains, it would not be confused with a delete. A potential point of confusion would then be when the user cuts something, since then it would also disappear.
   b) It could alternatively appear to get smaller into a single point.
   For both a and b it would make sense if cut behaves the same way as copy (except the original also disappears (or greys out - in case of files)) and for paste to do the inverse animation.

If an audio cue is added, I feel the copying should be increasing in frequency (conveying something being picked up; maybe like vacuumed/sucked up kind of sound) and pasting could be a sound hinting at a plop - something nice a satisfying (squishy?) being put down.

Prior Art (Optional)

Android and iOS (and macOS?) don't seem to have this feature.

The previously linked askubuntu thread has some user made examples.