A bit on background...
30 years working for a world leading pharmaceutical company. Equipment services, servicing and maintaining all of the automation and robotics manufacturing class 3 medical devices. We had gear boxes the size of recliners, 12v cummins fire safety pumps, hydraulic injection molding machines, lathes, mills, all types of custom automation.
I was a lead on our autonomous maintenance program. I have extensive knowledge of oil analysis and what the results tell you about the oil or fluid being sampled.
We sent oil samples in every six months... for equipment running 24/7.
Oils are better, engines are better designed. (mostly)
Think about it this way... diesel engines in fleets are serviced based on oil analysis results. They can tell you how much copper (from bearings), iron, moisture, and even down to the ingredients of the oil.
Dirty filters, filter better than a new filter. (to a point)
Warranty, as long as you have the documentation from the analysis your covered. They can't blame anything on oil when you have the documentation to prove it was good.
Shelf life. I bought a few cases of GN4 oil years ago, it is still perfect. The additives will separate from the base stock if it sits to long, this is why they say there is a shelf life. I have a burr tumbler which vibrates really hard. I set the oil on the tumbler until I can't see any sediment in the bottom of the jug, then leave it another hour or so. Yes, I sent in samples of brand new "old" oil... perfect.
If anyone wants to change their oil every six hundred... knock yourself out. If you like throwing money away for no good reason other than it makes you "feel" better, it's your prerogative.
For me, I changed on the Honda recommended schedule for the first three oil changes and sent in a sample for each change. Nothing wrong with the oil and 98% of the life of the oil remaining. I now change my oil every 3k. Still has 90% of its life left with no abnormal / high PPM of any contaminants.
BTW, the autonomous maintenance program at work had a net savings of over 1.1 mil annually, in fluid, labor and other expenses for oil changes. This doesn't include machine downtime.