In Update 5, we're introducing soft and hard clearance for buildables.

Any building with functionality such as constructors, assemblers, power poles, splitters, the hub, etc.

will have hard clearance, and any cosmetic pieces, conveyor belts, and pipes will have soft clearance.

Any two buildables with hard clearance will not be able to be built clipping into each other, just as before.

However, objects with soft clearance will now be able to be built clipping into other buildings.

This will give players a little more freedom as to how you want to build your factories where previously you'd be limited by the old clearance system.

Whether you actually want your build pieces to clip or not is totally up to you, and if this is something that bothers you, then you'll still be notified by the game when soft clearance clipping occurs.