Why do you describe it as less directly related to squid and varnish? I haven't worked with ATS before, but it's documentation describes it as "a high-performan

Why do you describe it as less directly related to squid and varnish? I haven't worked with ATS before, but it's documentation describes it as "a high-performance web proxy cache that improves network efficiency and performance by caching frequently-accessed information at the edge of the network" which makes it seem to fill a similar role as them.