Well I've worked in the motor trade over 45 years and I'm sorry to disagree here but cars do change even during their life, and in fact I could point out manuals which were out of date even when the car was first introduced, because the manufacturer made some late changes, and with preparation and publishing lead times the manuals had already been written! However, let's leave that topic as we are really discussing the Gemini here!
Thanks again for the explanation, and I hope eventually to have Linux on mine too, but don't feel confident enough yet to re-flash it, plus I'm not sure that any of the flavours of Linux is really ready for the gemini yet. I quite like the sound and possibilities of Sailfish but only when version 3 comes out.
I didn't mean the life of a model of car, I meant the actual instance of the car that you buy will match the manual that comes with it. Up until recently when touch screens were introduced, the manufacturer didn't issue an update that changes where switchgear and pedals are, and what they do. An owner may change it, but you don't get an update from the manufacturer to change the layout of the dash. Obviously when a new model revision comes out, it comes with a new revision of the manual.
This will change now, with cars like Tesla that can get an OS update over the air and much of their control is done through touch-screens, their printed manual (if there is one) will become outdated and less useful just as the Gemini one will when the Oreo update appears.
For your other point about linux not being ready, I think you can say the same about the Android. Definitely no going back to Android for me.