I scheduled a Lyft for 2:15am and started getting nervous as the window passed.  Finally I was accepted at the moment I was about to cancel for an Uber.  I arrived at the airport a few minutes after JAX normally lets people through security and did the print-your-own luggage tags.  Now in Atlanta on a quick transfer.  That last Delta flight was fast, but cool in the blueish-purple glow and early morning travellers.