On JLR's own figures most new Defenders are basically OK; out of 10 vehicles delivered, 5 will have no issues, (other than the ones the dealers create with their own ineptitude), 4 will have minor issues, usually around the infotainment/software load and one will be a total rogue, with multiple issues and not easily sorted by the local dealer or even with JLR input.
JLR have sold a lot of new Defenders, so there are a lot of happy people, slightly less mostly happy people and a 10% band who want to chase JLR staff with fire and pitchforks!
Hopefully you will have one of the good ones, (and the odds are on your side).