Some people wanted to follow the progress, so I've created a task list for at least the book articles. The quick tour will be updated by#4374 and the cookbook will not be as important as these other 2 sections, they'll properbly follow after 2.6 is released.

I've ordered them on priority.

• Controller (fixed byUpdate most important book articles to follow the best practices #4427 andCompletely re-reading the controller chapter #4433)
• Templating (fixed byUpdate most important book articles to follow the best practices #4427)
• Routing (fixed byUpdate most important book articles to follow the best practices #4427)
• From Flat to Sf2 (fixed byUpdate most important book articles to follow the best practices #4427)
• Page creation (seeUpdate page_creation.rst #4685,Update page_creation.rst #4687 andUpdate page_creation.rst to focus just on pages, splitting other info to separate doc #4690)
• Http fundamentals (seeComply with best practices, Round 2 #4507)
• Doctrine (fixed byComply with best practices, Round 2 #4507)
• Form (fixed byComply with best practices, Round 2 #4507)
• Security (no changes needed, seeUpdate book to comply with best practices #4431 (comment))
• Validation (fixed byUpdate book to comply with best practices, round 3 #4779)
• Testing (fixed byUpdate book to comply with best practices, round 3 #4779)
• Propel (fixed byUpdate book to comply with best practices, round 3 #4779)
• Http Cache (fixed byUpdate book to comply with best practices, round 3 #4779)