An HTTP application server matching routes based on runtime configiuration (domains and whatnot) is not really that niche or contrived? Loads of other situation

An HTTP application server matching routes based on runtime configiuration (domains and whatnot) is not really that niche or contrived? Loads of other situations where input not changing during the thread/process lifecycle is part of a set of hot regexes large enough that explicitly compiling each is not a great experience. I, for one, appreciate /o.