I wrote a blog post that generated a lot of traffic on HackerNews last year when it briefly was on #1 here. My blog was (and still is) hosted on a 9-year old Dell Latitude E7250 with Intel Core i5-6300U processor. The server held up fine with ~350 concurrent readers at its peak. It was actually my fiber router that had trouble keeping up. But even though things got a bit slow, it held up fine, without Cloudflare or anything fancy.