Earlier quoted context omitted.
The HTTP headers alone to do a couple of requests are more than 4kB. The text alone of an article can easily be more than 10kB (that's about 1500 words). 3k might have been correct in 1997 for a single standalone HTML page with only text, very little text actually, and very little formatting. 100k is doable for a very minimal site.
1500 words is much longer than the norm for a blog post. The standard length for classic newspaper columns (in the U.S.) was 700-750 words, and most bloggers don't write posts anywhere near the length of a newspaper column. By the way, are we talking about normal blog posts or are we talking about "sites"? What is a "site"? Wikipedia is a site. So is a page with nothing but "Hello, world" on it.
Most articles on the top of Google (outside of news) are much longer than 700 words. See there for some numbers:
https://www.snapagency.com/blog/whatll-be-the-best-length-fo...