It's not essential but building roboport network(s) has significant benefits. I would say roboports and construction robots are a complete game changer.
If you've built a "mall", assemblers to create the various items to expand your factory, with their output going into logistic chests that you'll also have available, you can use cut/copy/paste, blueprints (or manually placing ghosts) and upgrade and deconstruction planners to order changes, and leave the robots to the task while you do something else.
Construction robots will use repair packs to automatically repair damaged entities (using repair packs) and replace destroyed entities in the network's range, assuming the relevant items are available.
Building roboport network(s) also means you are prepared for logistic robots that will come later.