Even in the rust free areas I bet there won't be any Metros that are still working in 20 years. The cars were just not built to last that long. The motors and drivetrains are fine but the unibodies suck, except for mine
So the one or two that are left might be a collector car about like any old obscure and rare car. But I doubt you will ever see one at a classic car show.
But really once there are some basic cheap cars being sold here that beat the XFi mileage then the Metro will be forgotten to everyone except the hard core nuts. I will still have my car 20 years from now but it will be retired to my garage with the rest of them. Besides nobody in their right mind would buy my car now anyway.