Everything. Writing plain HTML used to be easy - if you could edit a text file you could slap in a few tags and be happy enough. Having to learn CSS (there is

Everything. Writing plain HTML used to be easy - if you could edit a text file you could slap in a few tags and be happy enough. Having to learn CSS (there is nothing easy about grid/flex) just to get a good looking site is way more effort than most people want. Hence the reliance on content managers/social media site that do this hard work for you, at the cost of personalization.