The vast majority of the time I find wired ethernet 100% stable. All my devices are able to detect each other and Windows file sharing works. However over the years with wifi I've found at various points with different routers, switches and access points things go undetected, e.g. chromecasts, windows file sharing and strange things make them start working e.g. access DLNA via my Playstation and suddenly the whole network works over wifi not just wired ethernet. Why does wifi do these weird things sometimes?