@vkc to turn this comment over, have you ever questioned the mouse design? What is the purpose of the middle button now? It's a waste of a switch ? p.s. I've been using middle paste since I moved to Linux (~1999) it's way faster than alternatives as long as your mouse isn't physical difficult. I chose my mouse carefully for that reason. Now, the feature is not really gone, it's just disabled. There is a thing called gnome tweaks, you could disable it for a while, now you can enable it instead.