We also include a large number of detailed picture examples, often with 3D renders, that help you understand the context of the rules. For these reason, we generally don't start laying out the final rulebook until production art is complete. Writing and laying out a 20 page rule book like this generally takes about 3 months from start to finish, usually requiring a complete rewrite or two, and involves dozens of editors.

found that using only the Pascal-provided control structures, the correct solution was given by only 20% of the subjects, while no subject wrote incorrect code for this problem if allowed to write a return from the middle of a loop.

At the start this is hard to get right, and bad practices will sneak into the codebase.

6to5 attempted to ship a quick and dirty TDZ static checking feature but had to retract it immediately afterwards due to various bugs in the algorithm.