reading yoru entirely comment, I am not entirely sure if you mean changing how it's implemented or if you really would like to get rid of the user interface it has.
Because copy-on-select along with middle-click-to-paste is like ... the best thing. Tiny bits of data stuck that follow your cursor is the most information-at-my-fingertip feeling that I can get out of these machines.
I've hated this feature for 25 years. I run up against the design flaws of this limitation alone usually multiple times a day. From websites that try to have some funky JavaScript convenience (including nearly impossible to use things like medium) to applications that want to select the entire thing and destroy the clipboard as I'm trying to put something in. UX limitations and bad design make it utterly useless constantly.
The whole paradigm is broken. From applications that just select the entire document when you're one pixel off the line of selection, as if anyone has ever asked for that, to application interoperability with anything more than text, parity with windows OLE from around 1993, being still a total pipe dream. Drag and drop is still totally dependent on what toolkit the two programs you're using was written in.
That's nonsense! It'd be like a world where I can't pipe say output from python as input to a bash script because they were implemented in different languages and people would be like "welp. That sounds right. I don't see a problem here"
Also the world of programmers have decided they can go around randomly selecting shit to try to make my life dealing with clipboards easier even though it just makes it utterly unusable. I'm not going to go on a crusade to personally win that fight on a program by program basis. It'd be so much better to have flexibility on how clipboards work
Things could be amazing but instead we defend it being terrible.
Here's an example. Imagine where I can not only do basic asks like drag from inkscape to figma but also have something I'll call a "transport station" where I can drag things into a dock to share them with colleagues who can receive them and then put it into their application of choice, in a non-destructive, non-disruptive way that maintains the flow of productivity. Sound like a smooth and fantastic collaboration tool? I agree.
I've tried to make this, there's lots of fundamental problems that ought not exist. That's the power an unbroken clipboard could have.
What do you do with computers where you don't viscerally feel these limitations daily?
I will grant you that the situation concerning copy/paste as a whole is "not great", I have certainly run into issues before. But this interaction where selecting a word either by dragging a mouse along some text, double or triple clicking to select and then being able to paste this text somewhere else just by pressing the middle-mouse button is just really god computing.
Crucially: This is a very local interaction that does not interact with my clipboard at all. Which lets me copy two things at the same time. I use this all the time for copying/pasting username/password combos.
But that reminds me - the correct way to do this is setting up my password manager to do it for me...
I am interested in the "transport station" you described. I am currently trying to find a way to seamlessley working on multiple computers at the same time, and a shared clipboard like that would be really iteresting. Also to synchronize to my phones' clipboard. Do you have some already written notes on the issues that you ran into ?