In reply to David Roberts.

Habit? Honestly I don't know. There are some elements of standardisations that help. A quick check on length, number of figures, ease of finding specific things?

But yes there's almost no reason for this and there would be much better ways to handle most of what this is supposed to achieve. I'll be talking a bit about why its harder than you might think to just implement new systems to do that in the next post.