That's an old conversation but I think we should distinguish between designing and building a knife.
| Designed by the customer | Designed by maker with options selected by client | Fully designed by knife maker |
Hand made (possibly outsourcing HT) | A | D | G |
Mostly machine made but with manual work | B | E | H |
Fully machine made | C | F | I |
Here the columns are for the design and the rows are for the build. Perhaps it will help clarify the conversation.
For me a custom knife exist in cells A, B and C. What is important for a "custom" is the fact that the customer defined the design. The build is irrelevant.
The cell F this is the case when the maker propose to "build your own" knife like with Olamic when you select between a multitude of options.
The cell G is for a maker building his knives manually and then selling them on his website. The client can only decide whether or not to buy, but does not determine the knife's design.