DevRel activities are also impacted by where in the product lifecycle you are: do you need awareness vs do you need to make your customers more successful. Growing product needs different activities than a mature product.

DevRel is most effective when it is part of the company that makes most meaningful decisions about product. For example when I was at Adobe that was Marketing; Google - Engineering

Man, what a great write up from @remotesynthesis.com here. I would quibble with bits of it, but for the most part it’s completely spot on.
Quibbles:

Gonna listen before I speak for a while here. Lest one of my inner monologue dread thoughts brings down the vibe here in a way that is off-putting.