From this Guardian article, published around the release of The Craftsman (and because there were too many quotations to put in a Pinboard link):
…the ideal of fit-for-purpose can work against experiment in developing a tool or a skill; it should properly be seen as an achievement, a result. To arrive at that goal, the craftsman at work has instead to dwell in waste, following up dead ends. In technology, as in art, the probing craftsman does more than encounter problems; he or she creates them in order to know them. Improving one’s technique is never a routine, mechanical process.
To work is to develop one’s skill, if you like; “dwelling in waste” is part of the process of the craftsman.
Three abilities are the foundation of craftsmanship: to localise, to question and to open up. The first involves making a matter concrete; the second, reflecting on its qualities; the third, expanding its sense. The carpenter establishes the peculiar grain of a single piece of wood, looking for detail; turns the wood over and over, pondering how the pattern on the surface might reflect the structure hidden underneath; decides that the grain can be brought out if he or she uses a metal solvent rather than standard wood varnish.
Which all seemed very relevant, given Technology as a Material.