> I think the EE team make sense to be created "on demand" and not as a permanent solution
For the size and intensity of effort going on at Twitter, I respectfully disagree.
Once the team gets large enough, NMP ("Not My Problem" mindset) comes into play, and unless you have the culture from the beginning to always be making the development process better, and acquisitions and new management has never changed that, which is highly unlikely, then having a dedicated person or team to help make other developers jobs easier is a great idea- after the team gets to a certain size. What that size is depends on what is being done, though.
For the size and intensity of effort going on at Twitter, I respectfully disagree.
Once the team gets large enough, NMP ("Not My Problem" mindset) comes into play, and unless you have the culture from the beginning to always be making the development process better, and acquisitions and new management has never changed that, which is highly unlikely, then having a dedicated person or team to help make other developers jobs easier is a great idea- after the team gets to a certain size. What that size is depends on what is being done, though.