Do the same with personal vehicle and regularly take them 200-250K. Maybe it starts to impact things at 300K or 400K. I don’t know; not sure.Nothing subjective about it. You followed the automakers OCI and your engine did not spontaneously seize up at 120-150k miles. There's a psychological benefit to over maintaining ones vehicle and being human was make up all sorts of SUBJECTIVE/ANECODTAL reasons to justify it.
Again we’re stuck are in the gray area we live in around here... something could happen or nothing could happen.