Not only that. If you have DS & DE in different orgs, often DE is in an IT org that also has to support legacy systems that sometimes become very time intensive

Not only that. If you have DS & DE in different orgs, often DE is in an IT org that also has to support legacy systems that sometimes become very time intensive. So then the DS org says they can't get stuff done because DE does not deliver, and DE can't get things done because the "elder engineers" in their org are not allowing reformation. So they are stuck between a rock and a hard place.