I disagree that it’s selfish. I am always willing to share my knowledge, and have on many occasions, but most developers I’ve worked with don’t have much intere

I disagree that it’s selfish. I am always willing to share my knowledge, and have on many occasions, but most developers I’ve worked with don’t have much interest in that particular skillset. If I quit my job, it is leadership/management’s responsibility to find a replacement; It’s also their responsibility to encourage knowledge sharing, cross-training, and have resource redundancy within the project.