It's been a while since there has been any news about the Delmar Loop Trolley's startup date. The headline of the last article about it in November 2017 said "No Money No Trolley" which should give you an idea of what the delay is about. From St. Louis, MO Post-Dispatch, 11/18/17:
No money, no trolley: Loop Trolley Co. says it won't begin operations without another $500,000
The Loop Trolley Co. has notified key local officials that the long-delayed line won’t begin operating unless it gets a new infusion of $500,000 to cover startup costs and initial operating deficits.
So it appears to be a stalemate. One would hate to see the investment in the infrastructure and the obtaining of several trolleys from Portland and Seattle all wasted for nothing. Anyone have half a million sitting around?