I wholeheartedly agree with point 7 Your goal is for your team to thrive without you.

I spent a lot of time also playing a Scrum Master role in addition to my regular duties. So much so that some managers asked me to pursue this full time. I always explained that my goal is to be there just as a point of contact and that the team should be able to manage itself.

Sadly, I see so many managers, scrum masters, or even regular engineers consider this as a dumb approach to make yourself replaceable. If you don't hoard knowledge then you'll be laid off when the company's numbers look bad.

Agreed, I was fortunate enough to learn this lesson early in my management career when I was passed over for a promotion I felt I deserved for someone who's team was able to operate without them. Looking back, I know this is why he got the role rather than me, my team couldn't live without me whereas his could and therefore he could take on the expanded role.

I've always told my engineers that their job is to get me fired for redundancy.