Comment by wheybags
100% true, I've hit the front page of hn on a server with an old i5 (aka consumer hardware, and not even high end) with no cloudflare or similar caching, and had no problems. Computers are fast, and serving static html over https is a solved problem.
You're right that serving static files is easy, but OP is using WordPress, not static files.
Disclosure: I work for Cloudflare.