Bostinno has an article on the T challenges of a Widett stadium:
http://bostinno.streetwise.co/2015/...ircle-stadium-south-boston-red-line-stations/
I recall some detailed discussions way up thread - I can't find them or I'd reference them - from one of the members with deep rail knowledge. It laid out the quite substantial technical challenges of decking over the Cabot yard area. It was quite convincing, both in terms of the cost (tons of $) and potential negative impacts for the T both short-term (disruptions during construction) and long-term (inhibiting future track realignments).
In this article, Davey is repeating the hedging on venue locations. I've heard a gradual uptick in references to Suffolk Downs, from various folks with Boston 2024. I freely admit that I'm too lazy to go chase links, nor am I willing to define "gradual uptick", I'm just saying it feels like trial balloons are being floated.
I can certainly imagine Bev Scott's replacement, whoever she or he might be, reminding everyone that transportation upgrades in advance of the Olympics were meant to be only those items "already in the pipeline." Relocating or decking over Cabot Yard was not in the pipeline, and after events of the last few weeks, the new MBTA GM will have incredibly high ground to say "if Cabot Yard must get relocated, it ain't going on my budget, and if it's to be decked over, not only is it not going in my budget, it cannot be permitted to hinder T performance, since we obviously can't withstand any further problems." Davey is asserting in this article that all site work costs were included in the Widett Circle cost estimate, but I really have my doubts.
Shall we start a betting pool? Bet one: will the main stadium plan shift to Suffolk Downs (or some other spot), yes or no? Bet two: how long till that happens? I'm solidly on yes for bet one. I think the timing needs to be real soon, so I'll thrown Memorial Day out there as a first stab (built on very little beyond hunches). I guess bet three could be: if not Suffolk Downs, where else? I can't think of anywhere other than Beacon Yard.
I'm only offering embarrassment versus gloating rights for the loss/win on the wager, I don't care enough about this to bet money. Maybe I'd buy someone a beer a some point. If I am breaking some archBoston rules about online wagering, please advise and I will edit the bets out.