Great book, lots of agile ideas and experiments tried out in the seventies. Some parts are a bit old fashioned, I think Wallander would have appreciated the ideas from Yuval Harari about the human mind in Sapiens.
This is a great book containing many nuggets of wisdom. It should be read as a description of a journey of a specific company; each decision was made in a specific context at the time. You can't take the decisions and apply them verbatim elsewhere, but you can take the principle and gain some valuable insights on how it might work out. I also like Wallander's explorative approach. The change wasn't done in a day, or as a one-off project, it took decades of trial and effort and cultural change. This reminds me quite a lot of Taiichi Ohno and his principle of minimizing the lead time.