This kind of dichotomy would be a huge pain for interactive use — if you have a long-running interactive session, every time you assigned a variable you would have to remember whether you had used that variable name before.
Yes, I think PSA: Julia is not at that stage of development anymore needs to be re-iterated here. It’s fun to talk about the etymology of syntaxes and what-might-have-beens, but no one is seriously contemplating major changes to Julia’s spelling/aesthetics at this point. If people think they are arguing over the future direction of Julia in this thread, they are bound to be disappointed.