That's an X11 thing that Wayland had to reimplement because it's so convenient. The problem is when pasting into the terminal something that another program copied into the clipboard. That's ctrl-shift-c.

I thought about remapping copy and paste to their own keys, possibly a single one. Maybe on the number pad, which I never use. Or remapping ctrl-c.

Isn't this an X11-ism? I dont believe this is Wayland-specific

Yeah I know. I missed this for the first couple days, but didn't take much before forgetting it after the change to Windows. (anyway I keep using Linux at home)

This is also a thing in X, not only Wayland.

But that doesn't go into clipboard history. And severely restricts what you can do between copying and pasting in general (very importantly makes it a pain to do replace (i.e. select+(implicit-delete+)paste)) as any intermediate selection before pasting destroys your Primary Selection. And if you realize you did that, recopying takes manually reselecting the text, or the otherwise-never-used ctrl+insert to recopy, instead of just repeating the same old ctrl+c as you always do with the clipboard in any sane application.

Of course still a nice option (esp. in terminals where the proper copy/paste are nerfed and selecting for editing is annoyingly not a thing), but far from a replacement for the proper clipboard.

How do you paste the selected text if you want to replace a text selection in the other window?

>middle mouse button

Speaking for myself (although I suspect many others), I haven't used a mouse in well over a decade. To be clear, I am in the terminal all the time. So this is not a universal solution.