Reasons for not being sorry to work from the old Dakota class 10th English the black aeroplane:

1. Comfort and familiarity:
The narrator mentions that they were used to working from the old Dakota class plane, which implies a sense of comfort and familiarity. This suggests that the narrator had grown accustomed to the plane and its working conditions, making it easier for them to adapt and be productive.

2. Sense of attachment:
The use of the phrase "was not sorry" indicates a sense of attachment to the old Dakota class plane. The narrator may have developed a sentimental connection to the plane due to the memories and experiences associated with it. This emotional attachment could have influenced their feelings towards working from the plane.

3. Efficiency and productivity:
Working from a familiar environment can enhance efficiency and productivity. The narrator's lack of regret for working from the old Dakota class plane suggests that they were able to perform well and effectively carry out their tasks in that setting. This further reinforces the idea that the familiar surroundings of the plane contributed to the narrator's work performance.

4. Personal preference:
It is possible that the narrator simply preferred working from the old Dakota class plane over other options. This could be due to various factors such as comfort, convenience, or personal liking for the plane. The absence of regret in the narrator's statement implies that they found working from the plane to be a positive experience.