It's barely jargon. I think a lot of people know that rayon is a type of fibre, and warp and weft are the directions of weave. I don't know what sett is, but I think it's mostly hard to parse because it's not very clearly written.
I would challenge you to share this with a non-developer friend and see what they think about that statement. You should consider what your personal experiences are with something before making such rather aloof statements towards others.
- People outside the field likely have enough concept of weaving (or fabrics) to know what the terminology might refer to.
- Weaving terminology is woven into our language(s). Before the industrial revolution, that was a huge labour industry - it was part of family/daily life.
- Words like 'sett' and 'weft' are clearly domain-specific and could be looked up. That's far less clear for 'language' and 'array' and 'map'; non-specialists are unlikely to recognise they are being used in a domain-specific way. Is a 'hash map' a type of map?
Understanding some of the words is far from understanding jargon. Even if you know all the words, you still don't know why this is an important topic to discuss. Which things there are carrying weight, and which things are more a throwaway to add color.
FWIW, it's quite clearly written for anybody who weaves. It seems unclear to you because you don't know the field. (Jargon extends to what kind of sentences and sentence structures you encounter)
Sett is the spacing between the warp threads, and I had a hunch about what makes it 'differential' but that turns out to be wrong and so I have no clue what it means.
Shetland wool is [a] Scottish wool. At one point half of the UK's exports were wool, so that makes it kind of a big deal. That's all I've got from being in social circles with fiber folk.
That depends on the direction of the fabric through, it's probably clearer to the uninitiated to say that the warp is the fixed "structure", and the weft is the "filling" thread you draw over/under the warp.
I believe that if you’re going to weave anything, professionally, you’ll pick the loom that’s the width of the shortest dimension of your design, for purely practical reasons. I briefly worked as a mechanic in college, and what separates the pros from dilettantes like me is speed. I’ve heard similar tales from other skilled laborers. “portrait vs landscape” I understood to be very much a speed issue with looms.