[russtrotter]

There's all kinds of non mission-critical software that gets made with little life/death consequence on how it gets made. There doesn't seem to be the same notion of the "bridge that barely stands" in software either since compute power can be thrown at something way cheaper than a rewrite. Thus, when it comes to the people that make software, there's a wild amount of interpretation on what "good" means and here we are.

And if I can opine on your Spring Boot example, unit testing can sometimes be easier for mock purposes if you have a set of interfaces (vs concrete classes) to work with.