The article is more about user experience than implementation. When you apply an effect in Photoshop you can change all relevant pixels at once. Whereas we don’t have good tools to change all words in a document at once (while retaining the intended meaning)
Oh that would be cool. Write a paragraph about a red ball, then halfway through, decide it's a blue ball. The editor then highlights all occurrences of the variable and rewrites them for you. Like the "Refactor local variable name" bit in VSCode.
