Implementing layering in real life
Now that we have covered all of this, it is important to note that on the one hand there is theory, and on the other there is life hitting you in the face. If you are working in a big enterprise, chances are your employer can pour hundreds of thousands or even millions of dollars into a feature to run experiments, spend months designing every little piece, and make sure everything is perfect. Even then, is achieving perfection even possible? Probably not.
For companies that don’t have that type of capital, you must build entire products for a few thousand dollars sometimes because they are not trying to resell them but just need that tool built. That is where your architectural skills come in handy. How do you design the least-worst product in a maintainable fashion while meeting stakeholders expectations? The most important part of the answer is to set expectations correctly. Moreover, never forget that someone needs to maintain and make...