I have to heartily disagree. Besides, you're more than welcome to make changes to any given recipe (and even notate those changes in the book!)

I love online recipes. I can see what other people said about the recipe, and it’s more likely to be something contemporary. Many of the recipes in cookbooks “age out” as that style of cuisine goes out of style. See: 1950s recipes with jello.

Mostly what other people say about online recipes is that they made something else by substituting one or all ingredients and altering the method.