Part of this longevity has no doubt to do with Windows' lasting APIs.
For the most part Winamp is able to do so as not much has changed when it comes to music listening on computers. For example audio cards are fundamentally the same devices they used to be decades ago and basic I/O workflow has not changed either. Same goes for the majority of music file formats with which Winamp is natively compatible.
What I do miss is Winamp's vast library of plugins (visualisation, tools, file format compatibility and countless others). To my knowledge the ability to source plugins today has gotten harder as the library hasn't carried over to the new website/owners. For me this is where Foobar2000 closes the gap. Unfortunately Archive.org is not the remedy in such situations where Winamp.com/robots.txt disallowed fetching of the plugin binaries. Example: http://web.archive.org/web/20120505234347/http://download.nu...