This is a great breakdown of how design patterns shift the focus from 'making it work' to 'making it maintainable.' I’ve found that the real shift happens when you stop seeing patterns as just theoretical structures and start seeing them as solutions to specific 'code smell' scenarios. For anyone currently digging into these patterns, I’ve been working on a tool that summarizes technical deep-dives and video documentation into concise, readable formats. It’s been helping me get through architectural documentation much faster—you can check it out at ytskim.com. Out of curiosity, which pattern did you find had the steepest learning curve when you first started applying it to production code? For me, it was definitely getting comfortable with the Strategy Pattern versus just relying on overloaded conditionals.