Japan cannot really avoid the need for 1 or more factories, and depending on their game plan, 1 or more built bases to facilitate the destruction of UK.
The UK can manage without any, though it is very difficult to survive the endgame without building 1 or more factories.
The other powers already have a ton of bases and choices. There are some specific situations where they may be helpful, but that has to be balanced against the cost of building them instead of units and them getting captured by the other side. If the base or factory only gets you an advantage one time (examples of that could be; building a Normandy Airbase, or a Queensland Factory), and you don’t see how its going to be used at least two times to gain an advantage in the remainder of the game, I’d decline to build it.