Theres no need for it here. The trolley makes good sense for Savannah, it only runs along river street and provides service to the tourists and locals hitting the bars and shopping.
Ok:
A trolley could run along Water St/Independent Square, then turn up at the Hyatt and hit the corner of Bay Street to service the 'town center' there. Thanks MetroJacksonville/Lake/whomever for that neat little 'what-if' graphic.
Civil - that graphic right there could be the Jax translation of Savannah's line. It'd connect bay Street, the Landing, the T-U, the Omni, and CSX and 550. I respectfully disagree with your statement of we have "no need for it here." IMO, this graphic screams the exact opposite. And it'd be a great starter line.
We do sort of have a trolley, the skyway, no one uses it.
'Cause it doesn't link much together. One Saturday not too long ago, on a family outing to downtown, we parked the car near the Prime and rode the Skyway over to San Marco Square, walked to the MOSH, hit RCBC for a late lunch, hit the Skyway back to the Prime, and left. Made a day of it. Good times. So there's two destinations, really, that the Skyway hits: The Prime and MOSH. Can Hemming Plaza be considered a 'destination'? Either way, most people don't consider any of those as such. It's partially, at least, a public perception problem as well.