Today, thr 6th Dec 2018, WordPress 5 was released and probably already landed in your Dashboard demanding attention, This update is a major overhaul of the software powering over 30% of websites worldwide. My personal experience is good, in fact really good. However for the non prepared out there it could be a nightmare, so hold fire on that update button and test first, Once you have updated there is no going back without a rebuild so be warned.