This technique is so fun. A kind of free crosshatching. I guess it needs a few days (or years or lives) to master but the path would be enjoyable.
The combination of ink and mechanical pencil 2H avoids blur/dirty pages in comparison with soft pencil drawings. Definitely I'd like to use more pencil in my pages but in my experience it tends to get dirty easily in a travelled notebook. However Microns are great and solve that problem. Just need time to learn how to produce textures, shades and contrast in lines.
My tiny contribution to design of Airbus A350 XWB was adding a fuselage section with orange shape. You can see it easily. Pay attention next time you flight :)
Just joking. Even when I was working on that airplane for years, I’ve never seen it (with the exception of an Air Show in Paris). And it was in 2021 when I flew on it for first time. Yes, magic of large multinational corporations and their complexity make that possible. An employee can work on something and never even see it.