The Importance of Technical Depth

I think as developers almost every developer wants to deliver great work. We just skip testing, we automated tests, we don't think deeply about good design and that leads most of the time to not so good quality. There is also something like software decay so even if we have create software, if it's like EJB 2.0 was maybe good 15 years ago but now even that perfect system is a bit outdated. I think there was a very interesting study survey from the University of TOCO where they asked people in Finland where does your technical depth come from? They said we either didn't understand the requirements, basically matched little understanding of the business domain. That was for them the main