The author argues that applications become truly useful when they specialize into domainâspecific tools such as code editors or spreadsheet builders, rather than remaining generalâpurpose; he cites Excelâs inevitable formulas and other legacy systems to show how users always need to learn a language, then introduces a songâbuilder app that autoâgenerates tracks with randomize settings, album covers, etc., proving that quick generation plus easy customization creates powerful toolsâfinally concluding that building specialized, customizable apps like a natureânoise machine with recorded sounds and a simple web interface is the winning path to success.






















