(Hi, I'm Roy Rapoport -- the author of both slide decks).
Referring to the Netflix version of the slide deck as "the old version" of the Slack version of the slide deck is inaccurate. I'm in a somewhat unusual position amongst the people whose READMEs were quoted, because I got to write one from both sides of the fence: As the established person welcoming a new member to the team (Netflix), and as someone joining a new organization (Slack). READMEs, for me, then end up looking very different.
It's also worth noting, as geofft notes, that Slack's culture and Netflix's culture are very very different, so the concerns of people within them would be different (and should be addressed differently). The concern that you might be fired was pervasive for new people at Netflix, and I sought to alleviate it; it's not a commonly-held concern at Slack.
Referring to the Netflix version of the slide deck as "the old version" of the Slack version of the slide deck is inaccurate. I'm in a somewhat unusual position amongst the people whose READMEs were quoted, because I got to write one from both sides of the fence: As the established person welcoming a new member to the team (Netflix), and as someone joining a new organization (Slack). READMEs, for me, then end up looking very different.
It's also worth noting, as geofft notes, that Slack's culture and Netflix's culture are very very different, so the concerns of people within them would be different (and should be addressed differently). The concern that you might be fired was pervasive for new people at Netflix, and I sought to alleviate it; it's not a commonly-held concern at Slack.