There are many challenges that are often underestimated. For example, the energy requirements of a 5G connection and the compatibility challenges are often overlooked. The requirements in the area of antenna technology are also underestimated - the network coverage of 5G is poor and the signals hardly penetrate buildings. A 5G application without 5G reception can prove quite useless in practice.
Our company has been involved in the practical use of 5G for a long time - we have already developed our own 5G routers and, for example, played a major role in solutions for the use of 5G in unmanned flying objects.