- Patterns like "Pipes and Filters" and "Signals and Slots" are *not* related to the process of software development, they are about internal software architecture. It does not matter how much one iterates over GUI during development with client's feedback, software still takes some input, processes it, and returns some output. Also, calling "signals" "inputs" and slots "outputs" is weird: usually signals are processed by slot (this is the Qt framework terminology for events and event handlers for GUI), so it is more natural to think about signals as inputs and slots as something that produces outputs.
- From the same section:
> I don’t know if these patterns are in a book, or have a name, but if not, they are now in a blogpost Or yeah, it is good to write an article without trying to do literature search first.
The last part of the article that says that people need to feel things before they understand whether they like them or not, was good, but I guess, all nontrivial things are done iteratively.