[bithive123]

As someone working in an enterprise environment, I've sort of lost interest in this breed of Rack server now that I've gotten used to having SSO and LDAP authorization available via Apache modules, to name a few features. Apache allows me to accommodate all sorts of requirements like setting up vhosts that require authentication except on the LAN, or vhosts which allow members of certain groups to access an internal app via reverse proxying.

I don't mean to be negative; other posters have that angle covered. But I would comment that this ongoing proliferation in prefork backends is hardly disruptive to organizations who have already made significant commitments to Ruby web apps. Our Apache/Passenger servers aren't going away anytime soon.