But what I lick of UE is that you can do everything with your keyboard, no need to use the mouse.

The same is true of the "column edit" functionality in VS Code. I don't think there's anything that requires the mouse, especially since from the keyboard you can invoke the command window to run any function.

But VS Code is what, 3 or 5 years old? When I was searching for a text editor, this was 20~25 years ago!

For sure. I was more pointing out a feature I find helpful (and one I didn't know about for a while) than trying to "convert" you. Use what works for you!