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>>I know a “principal engineer” who can talk the talk, write books and articles but can’t produce any software of real value, and I work with a guy that’s been working 1/8 as long as me and he’s ten times better.

Perhaps you're measuring value too narrowly. A principal engineer can act as a force multiplier for the entire team, even if they themselves are no longer efficient individual contributors.

I would argue that a principal engineer who can’t function as an individual contributor is a less credible leader than one who could.

I didn't say they can't function as an individual contributor. I said they can't function efficiently as one. Meaning: the opportunity cost would be too high, since the alternative is that they help their more junior team members grow and also help the company make the right decisions when it comes to things like system architecture, tech stacks, features, etc. Those types of contributions can be several times more valuable to the company.

Maybe what John is getting at is while a Principal can do that for a while, at some point their tech chops will get out of date and rusty, both in terms of industry knowledge and the company’s internal stack and best practices. At that point they may lose the respect of more junior engineers, which is a poor sign for company culture.

A senior IC that codes can stay relevant longer. The act of coding forces you to keep up.

Can you elaborate a bit more on what you mean by "force multiplier" please?

Andy Grove talks about this in his excellent High Output Management, where he asks the question: how should knowledge managers (senior ICs) and people managers spend their time?

His answer is: on high leverage activities. Instead of fixing a small bug that affects a few customers, fix a big one that impacts revenue; train others to be better engineers, multiplying their future output; improve the process your team uses to build product. Essentially, look for activities that multiply output, rather than add to it.

They multiply the skills of the people around them. They make everyone else better. It can be via a tool, a process, good code review, opening a path of knowledge, being supportive, giving confidence, listening well, or any number of other things.

Gandalf in the battle of Minas Tirith is a huge force multiplier. He embiggens the courage of everyone near him and makes them fight harder and better.

Someone who leads, inspires, gets people working at their best.

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