The Federation isn't the only technologically advanced power.If it's an era where the Federation has collapsed, or at suffered some form of major catastrophe, they may not have anything other than warp.
I'm not keen on seeing a "Fall of the Federation" storyline but there isn't any other story you can tell this far into the future unless you got a Federation bordering on transhumanist utopia where every problem can be solved instantly.
Poor Agent Daniels, jumping time like we take an aeroplane flight, he probably died in technologically primitive barbarism.