Sales is trivially parallelized, engineering is not.
Sales is trivially parallelized, engineering is not.
(There might be an off by one error there if you want to take it too literally; even aside from the variation in gestation period. Point is it is a parallelisable task, whereas the whole point of MMM is to argue that it's not parallelisable, that you can't increase throughput with more resources.)
(Primarily: short-term, hires will reduce productivity, because established colleagues see an increase in the amount of support & knowledge-sharing they need to do, reducing their output by more than the new hire can yet offer.)
We could even get the best of both worlds by laying the pages out on a clear surface, putting a camera on the other side, and hooking one of my eyes up to a feed of that camera. That would require some custom hardware and a little more up-front cost, though. We can look into whether that's cheaper than just buying another book.
Either method is a huge improvement on this "read two pages at a time" business, in any case.