How wrong can one comment be? You might want to read this post on the founding of Varnish https://info.varnish-software.com/blog/history-varnish-cache-10-years

How wrong can one comment be? You might want to read this post on the founding of Varnish https://info.varnish-software.com/blog/history-varnish-cache-10-years https://info.varnish-software.com/blog/history-varnish-cache... And Fastly would certainly disagree that it’s only useful for PHP as they built a whole company based on Varnish