I'm sorry, but the assertions that multi-exit housing blocks take up more space is frankly bollocks.
Housing estates in Europe manage it by having proper balconies that can be used as exits, but also having share walk ways out the front.
Not only can you have two or more exits, it also means that you can secure the building more easily as there are less doors to secure.
take this estate: https://maps.app.goo.gl/RXscnAJaDRCLausL9
there are 200 flats, a mix of 1-4 bedrooms. The biggest flats are about 85m2 (~1000sqft) every flat has a separate kitchen, living room and toilet/bathroom.
There are four exits to ground level on the "C" (the top, right and bottom of the block) they are secured by keyfob. Each landing is then secured by another keyfob.
In case of fire, the balcony divider can be pushed open allowing refuge in the next flat.
These flats are made of concrete, and there are only 4 holes into the flat above/below, meaning that fire doesn't spread. That estate has a fire at least once every 2 years, and it only affects one flat.