history is a best teacher and expands the angle view of people.
Can I ask questions like "Who (how) first used this technique in digital design?"?
A good rule of thumb for if a question is on topic is this:
If you're in a room with a professional designer, a computer engineer and a professional crafter, who would you ask your question?
If the answer is 'the designer' than the question is probably on topic.
I would probably ask your example question to the designer. Even with a historian in the room, the designer would probably be able to give a better answer.
TLDR: ask away.