My adventure vehicle, no matter how well-loved, isn't a long term I'll be buried in the vehicle. Backcountry is my primary recreation, put on more miles on my 4x4 than my daily driver car or other toys. I drive on beaches and close the salt air constantly, long distances on Canada's salted roads, and don't hesitate to drive down an overgrown road that will cause that nails on chalkboard sound of branches removing paint.
Had an HJ47 and a HJ61, pinned for an 80 for years. Stuff breaks, gets knock off, and I want the rig to be maintained perfectly as we always find ourselves remote far from cell service. Maybe 1 day I'll justify a new old Landcruiser, but being experienced with the cost to play I'll stick to 4 cyl Tacoma's/4Runner.
https://photos.app.goo.gl/pMa2Q5E5LbauEKjx7
Note scrapping sound in vid clip. Had a 3rd Gen Tacoma for 2 years, but it was a babied work vehicle, had less backroad pin stripping than my current Toyota after it's 1st outing.
Longest I've owned something is 11 years but I'm only 30, however I was pretty sick of it by year 5 or 6. Long term to me is probably ~10 years. Not really keen on keeping something longer than that mainly for reasons you highlighted.