There's two sorts of blogs. There's the one you describe which imo are trying to build an audience and gain reach. Then there are the more straightforward blogs

There's two sorts of blogs. There's the one you describe which imo are trying to build an audience and gain reach. Then there are the more straightforward blogs, where the author doesn't care about reach or viewership, and just wants to write up a technical process they painstakingly went through so either others can save themselves some grief, or they can look at what they did when they revisit the same problem years from now. Those types of blogs are indispensable. Its like documentation that someone actually went through and wrote in margin notes, like Snape's potion book.