Quick, tell me which selection will be pasted if I press the middle button of my mouse.
People either remember the '90s, where applications would only have one selection; or they remember when all they did was selecting text to and from the terminal and didn't have more than two windows. Once applications started retaining their own selected text, it was all over.
@ebassi the real answer is "random bit of terminal WILL be accidentally pasted into IRC" xD
The fucked up thing is that I do have a habit of using "middle click" paste intentionally in the terminal, because it is fast, but then I end up accidentally pasting random crap into chats all the goddamn time 
(mostly because "middle click" means "three finger tap", I'll admit that it's harder to accidentally middle click a mouse, but I don't want to use a mouse for anything other than gaming and CAD)
Emmanuele Bassi
Val Packett 🧉
Desert Camel