If efficiency gains were the secret go (infinite) growth, then companies would be able to grow their business without growing their workforce, building more factories, warehouses, etc.
Ininite growth isn't possible, but I genuinely believe near-infinite growth is.
By creating something new that is more efficent. Even if we ignore economies of scale as a source of efficency there is a replacement curve in action which would create growth! A situation where they would immediately scrap the old equipment for the same payload and switch to a new more efficient one is extremely rare.
We see it all the time? Google's revenue is up last quarter despite redundancies meaning they have a lower headcount. Adding robotics to a car production line can massively increase the productivity of a single factory despite needing less headcount, often allowing other factories to shut.
Something like Intellij or Copilot can make the entire tech workforce more efficient _far_ in excess of what it cost to make.