I am on both sides of this argument.
For example, the Inv/WIP Recon report just shows only job numbers, and it can be helpful when the number has meaning. Less to cross-reference by hand.
On the other hand, I also don’t really care. I have pushed for years to get past this notion. I have a screen called “Time Phase with Projects” and it shows extra information so that we don’t need the job number to be special. But it has never been enough. So instead, every day or so, we delete the (massive) unfirm jobs and create new, identical ones from scratch with our special job numbers. Total waste of time. But I can’t win every fight. However, it seems our new COO is very open to this so there is hope…
PS, myself and others in this forum have tried to lick this BPM issue before, to no avail.