And why specifically does an Olympic stadium downsized after the Games have to be shit? Are stadiums with temporary seating necessarily shit? How about stadiums with retractable seating in the lower bowl to accommodate a football field or running track? Please enlighten me.
This has been discussed. The Braves moving has nothing to do with the Olympics or the concept of a stadium with temporary seating.
It boils down to:
1. You can't justify the cost/benefit based on future use
2. You can't justify the cost/benefit based on the Olympics
Multisport stadiums suck. Especially when you include baseball in the mix. This has been proven time and time again. The size of a 400m track forces way too many design compromises, either placing everyone too far from the action, being the wrong dimensions for baseball or requiring retractable seating that sees top ticket holders penalized and precludes revenue-generating add ons like under-stand boxes.
If we go ahead and build a stadium that keeps the track we will use that track maybe twice more in the stadium's lifetime (e.g., to host world athletics championships). Under any other conceivable use we already have Varsity and York stadiums with more than enough seating. Therefore preserving that functionality is a waste of money.
If we convert the stadium afterwards to an NFL stadium (the most plausible and probably doable scenario) the new owners better pick up every penny of construction and conversion costs. Also, the preferred Olympic location (portlands) is not the preferred NFL location (Woodbine). There's also the pesky bit about us not having a team.
As Turner Field shows you can't satisfactorily convert a track stadium for baseball. Given that we would need to end up with a 35-40,000 seat jewel box stadium afterwards there's just no business or design case. Otherwise we would just end up with another Skydome that satisfies nobody.
And there's no point in converting a stadium to CFL or soccer because BMO field will satisfy those needs for a while. Any other dreams are just dreams.
In any scenario we are either left with a Montreal-sized unusable stadium or we build it for post-Games conversion to a 40k stadium that we don't need. And the stadium you do end up with is ridiculously expensive. This isn't cheap scaffolding seating like they could put in the end zones in Hamilton - we're talking about a fully-built structure where 40,000 seats get used maybe 2-6 times over the course of the Games and then destroyed. At a cost of thousands of dollars per seat. And no future tenant will pay for that so it's wasted infrastructure money. Look at London as the perfect example.
That's why the stadium is such a sticking point for a Toronto bid. Given a 40-year track record of stadium construction in North America and Europe the onus is really on the proponents to prove otherwise.