I've seen a lot of people here, on Beta, and in S-world complaining about how much they dislike the event buildings. So I decided to do some math.
In one complete set of the Winter events buildings in Future Era you get:
265329 Coins, 18222 Supplies, 3 FP, 13 goods, 200 medals and 2280 happiness (not to speak of attack, defence coin and supply boost) --> all in 26 spaces.
To come even close to matching that you need 3 SOK, a tribal square, a royal cascade and 8 victory towers which nets you:
74060 coins, 0 supplies, 3 FP, 12 goods, 206 medals, and 880 happiness (with no boosts) but takes 44 (yes FOURTY-FOUR) spaces.
In terms of space, this is an incredibly efficient set if you went for the full thing.
I don't get what all the hate is about. Yes, upgrading it is a pain in the behind if you get it in an early age, but those players aren't likely trying to min-max square use yet.
For late age players, I'm a bit surprised that its not more popular.