ELDA is part of AP. If you don't have AP you don't have ELDA. I drove all over the road today, crossing solid lines and double lines and received no warning or my car trying to take control as others have said it would do.
Those here saying that Tesla rolled this out because they care so much about safety are deluding themselves. They rolled this out to make AP more attractive to sell it to people like me that don't have it and to make new cars look safer to potential customers. It's about money not safety.
Just want to point out that this is completely incorrect. Lane Departure Avoidance and Emergency Lane Departure Avoidance are part of this update regardless of whether you have Autopilot or not. I don't have Autopilot, and I now have both of these features after updating to 2019.16.3.