If Lennon hadn't chose a 325 "all those years ago", the guitar would probably only be a footnote now. What do you think?
You could say that about a lot of things in life, though.
If I hadn't been an R.E.M. fan, if I had bought a Queen album instead of Out of Time
when I was eleven, I wouldn't be sitting near my girlfriend of six years right now, or playing guitar. That one album literally had that much impact on my life.
So, if Lennon hadn't played a Rickenbacker, what would the world be like today? I'd rather not ponder that question.