It looks like lots of people choose to lease very expensive cars, and give them back after 3 years for a new one, dropping a obsolescence time-bomb onto the second-hand market and providing a strong signal to manufacturers that there is a substantial maintainability-insensitive market segment.
I am still surprised that no manufacturer has a balls-out "buy our cars, they will NEVER DIE, anyone can service them, and your kids will still be driving them" model, as they might have lower returns from not gouging over subscriptions, planned obsolescence and parts and software lock-in shenanigans, but they'd instantly capture a market segment.
That, coupled with massive consumer preference for “zero maintenance” vehicles like supposedly not having to change transmission fluid for 100k miles. The manufacturers know that such a schedule will guarantee (more) damage, but it’s considered a marketing expense to handle early failures under warranty but sell the idea your car just needs an oil change every 10k miles and nothing else. After that first owner and warranty period the parts are simply considered a consumable.
If you plan on keeping your car for more than 3-5 years, toss the maintenance schedule handbook in the trash and figure out what an actual reasonable schedule is. It’s probably at minimum double the recommendations are.
For my car it’s been message boards with enthusiasts and mechanics who work on my vehicle. Luckily (or not…) mine is a somewhat niche performance car so people tend to nerd out over them.
A lot of it though is ignoring the vendor recommendations for outsourced parts like transmissions - go direct to manufacture and see what they say. This does seem to involve having an “insider” with manuals intended for service techs.
I also imagine fleet vehicle schedules might be informative as well.
Unfortunately I don’t have a very clean direct answer on it - it was a lot of feeling around and when in doubt erring on the side of over maintaining vs under.
Some is simply basic common sense though. We have not developed lubricants that can last over a decade and 120,000 miles in temperature ranges from below zero to hundreds of degrees.
Our love of blinken-lights will be our downfall.
And ironically, the reason why Japan invested so heavily in high quality was to overcome their former image of low quality products that severely hampered their ability to sell to international markets.
I am not a libertarian that holds a religious belief on the infallibility of the market, but a lot of times, the market gave us better outcomes than any regulation.
Welcome to the Dystopian world.