I'm 53, started at 10. At that time, being able to edit a line of code without re-typing it completely was "cool" :-) Then, on apple 2, we had GPLE (global program line editor) then Assembler toolkit which had an editor. Then I moved to PC. First I used GWBasic (it had an editor) then Turbo Pascal, then multi-edit, then emacs, then Visual Studio, then Eclipse, then Word (became a manager :-)), then back to emacs and VSCode (coding again!) and a bit of Kate.

I'm pretty sure they are not a native English speaker. Many languages use 'since 40 years' to mean what we say as 'for 40 years'.

Or maybe "since <<I was>> 40 years old"?

I think it’s an unfortunate typo…”old” => “ago”?

yeah, typed too fast. I was talking about 40 years ago. Apple 2+ to be specific.