If your business requires a lot of knowledge specific to your products, think adobe Photoshop, it is hubris to think a new hire experienced even in relevant fie

If your business requires a lot of knowledge specific to your products, think adobe Photoshop, it is hubris to think a new hire experienced even in relevant fields could meaningfully contribute for a long time. If your product uses an industry standard framework or standard, think adobe reader, then yeah, you can probably have someone hit the ground running. But a bigger problem is that when a new hire leaves after 2-3 years and you replace them with a couple people fresh out of school, so that anything they don't come out knowing has to get taught again. And if it takes some large fraction of the 2-3 years to learn your domain specific knowledge you are done for.