The pertinent question, since we are discussing an article, is how much impact the "press" has on vintage/used car desirability and pricing, vs. the obvious impact they have on new car sales.
When it comes to buying a new car, buyers tend to segment themselves, to "educate" themselves, and then to go try to get the best deal they can find on whatever it is that they have decided to buy. At the outset, any new particular car, comparably equipped, is going to be more or less like any other identical or similar car.
Used and vintage cars are an entirely different thing. Although this article, and many others, attempts to compare a "used" 1M to a new M2, the reality is that every used 1M is unique, as a result of how old it is, how many miles it has been driven, what kind of miles, what kind of treatment (by the driver) and what kind of maintenance and repair history it has. As one who has bought a number of used and vintage BMWs, I can tell you from personal experience that each one is different, more or less akin to comparing bottles of a fine wine separated from the case on initial sale, with some being stored in a proper cellar, some going into a closet, and some sitting in a box next to the water heater or furnace
And you can't always tell which one has been stored next to the furnace vs. the one perfectly cellared based on the sales description or even an inspection of the bottle. It is the same with used cars.
The 1M will always have its fans. It will, however, be viewed as a used or vintage car going forward, and any comparisons with current production cars will be as much based on romanticism with the past as it will be based on the actual reality of the 1M vs. whatever car it is compared to that is currently in production.