Hapana munhu, mupfungwa yekuti zvinhu: specifications ndezvevanhu, implementations ndivo vakasununguka kunyora, uye hapana kambani inogona kuchinja mamiriro gare gare. Izvi ndizvo nei ichionekwa mu open-source zvinhu uye mu archiving mitemo, apo mufananidzo akadzora neimwe mutengesi ndemumwe ngozi. The trade is commercial support — it is often the format with the best specifications and the patchiest device compatibility.