I'm a Brit, so I'm not sure how relevant my thoughts are, but the big issues I see for the Grenadier is it is a bit too small to be a conventional luxury vehicle and they have failed miserably to deliver the original "maintain it yourself if you want, as remotely as you like" vibe by not releasing the workshop manuals and parts books. Even when they do, how will I fix it when I don't have reliable access to the Internet? (needed to validate the licensing).
{Give me a .pdf to match my vehicle's spec tied to the VIN and where suppliers restrict their IP, show the empty spaces. I don't expect to be able to rebuild the engine or gearbox at the side of the trail, but I need to be able to diagnose which assembly needs to be changed to make it mobile again. I also need to know where all of the wires/control units/connectors are so I can customise my truck without breaking stuff}
I bought mine as a deliberate attempt to buy a vehicle I could keep for 20+ years; run it, alter it, add stuff to it, rebuild it to shiny, pass it on to my son. I have a 50 year old Morgan with a similar mission, but a much simpler bit of technology.
Overbuilt vehicles like the Grenadier should be able to last forever with regular maintenance, so this should be the vehicular equivalent of a Dualit toaster, Rolex or Tudor watch, Wusthof knives; designed for a long life of service, capable of use long after contemporaries have been turned back to bean tins.
I think Ineos should keep the overlander/adventurer images, adding exclusivity by offering custom packages geared around extended travel rather than wooly headlining, but also target industry where custom bodies and fit out is commonplace. Just giving owners free access to the technical manuals would give you a massive marketing differential to your competitors! I can think of a few fleet operators who would be delighted if they could do basic maintenance on their own fleets without friction.
Most owners will not venture into the unknown, (my wife hates camping, so I'll just be doing motorsport weekends), but we want to feel like we can, and those that do, give the rest of us hope! I do want to be able to address my own truck with a spanner and laptop, but more so I can customise it - the dealer is welcome to all of the work that needs a lift or environmental disposal licences.