When I first bought the Saturn I was still Old School doing oil and filter changes every 3,500 miles. After joining the most active Saturn forum at the time, I found that a lot of people were advocating for going by the OLM, with evidence supported by oil analysis (I was still so Old School that I wasn't even aware of having such a service available to ordinary peasants like me LOL), so I decided I'd use that method. With the long commute the OLM usually came on about every 8,000 miles and that's what I always went by for the whole time I owned it. Until recently I was treating the TB the same way but since I recently decided to hold onto the TB until death do us part I've gone back to every 3-4,000 miles, mainly just because it makes me feel better. Using the OLM obviously did no harm to the Saturn and after 196K miles on the TB I have no evidence that the engine has suffered from going by the OLM. Just did a compression check a year ago and got 180-190 across all 6 cylinders. Of course I realize that's not the only measure of a healthy engine but it does say something. All that to say that going by my experience I'm not convinced that the OLM is necessarily a bad thing, at least for GM vehicles.
Having an accident that totals or disfigures the car significantly has become my greatest anxiety now. Prices skyrocketing and quality plummeting have completely turned me off to something new, and even used vehicles have gone off the charts price wise. Long before the internet I bought a lot of used cars in my life and usually did well with my choices. Now, even with all the internet resources available it feels daunting to think about all the time I would have to spend hunting down good value in a used car.