The problem of thin columns is the scrolling in my opinion. Currently the writer can't restrict the column height. So readers should scroll down and up if the post is long.
If browsers provide a CSS descriptor to limit the column height so that the page contains multiple columns and, if overflows, the overflowed content is shown in the downward direction (not horizontal direction), then maybe I can try this.
If browsers provide a CSS descriptor to limit the column height so that the page contains multiple columns and, if overflows, the overflowed content is shown in the downward direction (not horizontal direction), then maybe I can try this.