Restoring a couple of my 20-25 year old vehicles two decades ago was a nightmare. Fun? Yes, but still a nightmare. The original manufacturer of each vehicle had largely stopped making replacement parts and the parts houses only sold a few high wear items (tail light lenses, window cranks, etc) or offered rebuilding services (brake calipers, starters, alternators, etc). If your vehicle hadn't been babied you were forced to scour junkyards or old farmer's fields for rusting hulks that you could liberate a few parts from. Tetanus or spider bite were constant fears.
Twenty-five years later there are more parts available for my early 70s pickup than ever before. I just purchased a brand new repopped component - a complex molded plastic dash cluster housing - that I have been searching for since I bought the truck in the late 1980s. They've just now been remade. I nursed my old one along with epoxy and bailing wire and zip ties having never found an original in good enough condition to bother with. I paid $40.00 for the new one. I would have paid 5X the price for a new one a few years back and may pick up a spare. Similar options are now available for my late 70s SWB 4X4.
My point is that we now have the potential to keep a vehicle on the road almost indefinitely. The internet, nearly useless 25 years ago, can coalesce like-minded enthusiasts (and the temporarily smitten) into self-perpetuating communities that align together to solve heretofore insurmountable problems. Cheap small-run manufacturing concerns will turn out just about anything that can be cobbled up in a CAD program and everyone knows someone with a 3D printer. We are no longer on a solo journey with our passions, scratching our head up under the dash or wandering dusty back roads in search of tiny mechanical treasures. If there's something you need or don't know how to fix on your vehicle, there's always a forum ready and willing to spell out umpteen ways of getting or going about it just a click away.
There is one caveat, though. The vehicle (or gizmo or gadget) must have the potential to deliver usability in balance with the pain endured to keep it functional. Some vehicles do this better than others. A 40 Series Toyota is worth it. A Toyota Tercel is not. From my perspective the Ineos Grenadier is a pretty safe bet. I'd lay odds that there will be a sizable dedicated cadre of Grenadier users twenty, thirty, even fifty years hence still running, rebuilding, and re-using these vehicles. I even expect this forum to, soon enough, become a vendor's showplace that will net
@Stu_Barnes and his henchmen
@Krabby and
@anand more than mere coffee money. I'm not sure that will prove true with New Defender. Or the RIvian. Not in the long run.