[joshuanapoli]

There is obviously some distribution of productivity in software developers. In young startups, a highly productive developer has an outsized impact. A delay in product development can mean the company is entirely blocked from advancing its growth. The cost of a “slow” developer can become the entire burn rate of the company, as everyone waits for X to be finished. A more productive developer has a better chance of staying ahead of the critical path.

[davidgerard]

One effect is a fresh set of eyes. When I started my last job I immediately reorganised a pile of stuff in useful ways just based on my previous job - which made up for not knowing anything about the local lay of the land as yet. It can give your first few months a real perception boost!

[Eisenstein]

And how much delay is caused by waiting for that developer to show up and get hired?

[joshuanapoli]

Yep, you are also right.