In his publication describing CUPID principles, Dan North begins with the question, "If I do not think the SOLID principles are useful these days, then what would I replace them with?". This got me thinking about what I think of SOLID and how I look at it. In my presentation, I would like to break down this acronym into its components, test its usefulness with examples (based on a Symfony-based app), and consider what we can take from it. I will also try to answer the question posed in the title of the presentation.