It is my understanding that any future option can be added to an existing Elio at any time. If I remember correctly this is per PE. Would this not mean that later, when said glass roof option is available, I would be able to get one installed?There is no word on whether the Gen 1 Elio will even have a sunroof option. There was talk of future models having the option for a completely glass roof though. I don't think you will need to make a decision, because it won't be an option :/