Way way waaaay back on release (or was it in beta?), there wasn't any hero limit. You could pick 6 Winstons and go full monke on your opponents.
Then they made each hero unique, but you were still free with comps. You could pick 3 tanks and 3 healers, or 5 DPS and a poor tank who'd get flamed for letting his team die.
Eventually they settled on a fixed 2-2-2, which was extremely boring and basically killed any kind of interesting strat or just fun play.
The smallest living space you're allowed to put for sale/rent in France is 9m², and those absolutely are a thing. They're very common for example for student housing, but also former maid quarters, especially in older buildings.
The English Housing Act considers that one person living in a 70sqft room makes it legally "overcrowded", although there aren't any legal minimal sizes to sell or rent a flat.
Ummm, either you mixed units or your parking spots are very large.
15m² is slightly less than a 4m x 4m square, that's basically a small flat (larger than the smallest legal flat in a lot of developed countries, in fact)
Give it an extra 20 years and your meat will fall off your bones though.