Wordpress is still essentially the status quo outside of technical circles and for non-technical people I'd recommend it over most other static site generators.
There's a whole pile of caching plugins for it, too. I can't speak to their relative quality, though; I just stuck Cloudflare in front of my site and called it a day. Perhaps I will come to regret that.
Using Wordpress to generate a static site is a useful thing, too. Improves both the security and the speed.