With the big box store JD residential versions, the previous comments might be correct. With the true commercial versions, those comments seem to be way off from what I've seen. The commercial JD's are not only known for their durability, but they also have a reputation for giving a beautiful cut.
I have a Cub Cadet 1045 that I bought new in the early nineties, I think it was 1992. I used it a LOT for the first 10 years or so, but have not used it much since then, but it still runs great.
That said, I expect that the new version is quite different so I'm not sure what my testimony is worth.
Larry