lol.
the world is not agin nor for me. Like mother nature on earth, benign indifference rules the cosmos, including my station in it.
I would not expect manufacturers to include or exclude a maintenance feature for the mechanically inclined owners. But such considerations would seem appropriate to be made on the behalf of the professional technicians employed by their own dealerships, who are charged with the oversized task of keeping the manufacturers cars running, at least thru the warranty period.
in my insignificant anecdotal example, yes the Jaguar folks did market the Mercedes transmission as “sealed for life”. Although I cannot imagine how they managed to do so with a straight face.
But some ten years,or thereabouts, after these cars were sold, Jaguar, and presumably Mercedes who manufactured the Jag’s transmission, did an about face, and without the slightest explanation, gave a revised transmission maintenance schedule which called for fluid and filter replacement on a regular basis somewhat more often than “lifetime”.