Maybe he was more of a "sensor" (personality type that needs to see a tangible result). A lot of developers are sensors (ISTJ in the myers briggs woo woo parlan

Maybe he was more of a "sensor" (personality type that needs to see a tangible result). A lot of developers are sensors (ISTJ in the myers briggs woo woo parlance), but also a lot are intuitors which might not need this.