With their culture, something big will be worked on by a relatively small team in total secrecy. The team, in name of secrecy, will repeat the same mistakes that some other teams are fixing elsewhere.
Secrecy inside a company may help a team to focus on only one thing but it also prevents people from understanding the "big picture" and unless there is a special process for "sharing lessons learned", people repeats the same mistakes over and over. It is a little sad.
