Downtown condo dwellers are suppose to inject life into the city. However the deadest areas of downtown happen to be the places condos are standing on.
Do you mean they've become the deadest after the new residents arrived or that they were already the deadest and you're disappointed the developments haven't enlivened them?
If they were already the deadest, I'd say it's good that developers are finally putting the areas to productive use. If they just became dead afterward, I'd find it very surprising since I can't understand how the condos could actually make an area more dead. I can see it if the area had been full of clubs with thudding music late into the night as residents would likely complain. But how would condos drive away normal bars/restaurants/cafés, stores, gyms, etc?