HTML is the serialized representation of a DOM. It's the closest to the metal that you can get. It's far more efficient at what it does (thus, faster, thus cons

HTML is the serialized representation of a DOM. It's the closest to the metal that you can get. It's far more efficient at what it does (thus, faster, thus consumes less power) than JS does. Byte for byte, JS is the most expensive part of the web stack, whereas HTML is the cheapest.