Thanks - again - your 57 startup lessons is one of the best posts about startups I've read (http://www.defmacro.org/2013/07/23/startup-lessons.html) I understood most of the points deeply only after failing in almost all of them.

Same applies here. Many seem to object to #7, but I totally agree with you. A great engineering manager is there to support the team to do their best work and the authority is not gained by writing code, but by making the hard decisions and solving people issues. Manager should only write code to be better in supporting the team by not slowly turning to a pointy-haired boss.