They might have to follow up with a “why we are never using <hosting> again”
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I once had to do terrible things to make a WordPress blog work under massive load. Actually not that terrible, I just did some manual caching; grabbed the html, saved it as index.html and made sure the webserver served that (if present) rather than WordPress for the front page, and approximately nobody clicked past the front page (I could have cached some of the article links too)
Thankfully, a little while later, I had a good reason to write a rage fueled just barely dynamic replacement of WordPress that met our exact needs with data stored as files. Not as fast as static files, but page generation in < 10 ms (IIRC) is good enough most days. Sadly, I think that blog moved to something slow again, but I no longer support it.