User blog comment:AdmiralPedro1stFleet/How to Explain Absence of Geth Juggernaut and Geth Hoppers/@comment-1900300-20120303022139/@comment-2094653-20120303172552

Yes this is more the few I hold except I push a little more towards they were recycled as opposed to them being stored somewhere. Some fans get annoyed and ask why they dont look like their normal selves and why the designs keep changing. This could be one possible explanation, which you seem to share