I find the only sites lacking a feed of some RSS-equivalent format are the ones that have commercial interests that are not compatible with RSS or really many o

I find the only sites lacking a feed of some RSS-equivalent format are the ones that have commercial interests that are not compatible with RSS or really many other open standards and principles of good web design but might otherwise make good app design, and home made sites that don’t account for the idea that one might want to read a feed instead of visiting the web page, if they even considered that some out there might still use feed readers.