Composting toilets

Modern composting toilets NEVER spoken about?  Miami Dade County Florida will spend 4 Billion dollars to take 13,000 homes off septic systems!  For ZERO cost to Dade County 13,000 homes could be retrofitted to composting toilets within 60 days or less.  WHY composting toilets are not marketed more?  Perhaps Big  Business has no reason to.  Only by change can the future be reached.  Composting toilets the future of human fecal disposal.