I'd like to clarify what I was asking and what prompted my question. YSL is now obviously in limbo due to the cresford situation, but it was initially proposed to be a supertall, and then when it was revised it was down to 299m. To me that doesnt seem coincidental.
Likewise, a couple of years ago I saw an article that seemed to think that at least one or two of the buildings in the development would eek into supertall status and yet they sit right below it. So naturally I was curious if there were any additional hoops to jump with the city if a developer crosses the 300m threshold.
It makes sense to me the architects and builders wouldnt care much about the difference between 298m and 302m just as they likely wouldnt care about the difference between 275m and 279m. However, from the aspect of being a world city, saying something like toronto has the most supertalls in north america, could be a potential attraction. (yes I know it doesnt and this development wouldnt push it into that threshold it's just an example)