[sampo]

> Show me source of your numbers.

https://en.wikipedia.org/wiki/Brooklyn

https://en.wikipedia.org/wiki/Mission_District,_San_Francisc...

> Why should we be focusing on the Mission, and not, say, Sea Cliff?

Why not both?

[timr]

You're comparing SF in 2008 to Brooklyn in 2017. Click the source link, and you'll see that current estimate for the Mission (30,408/mi^2) is much closer to that of Brooklyn. The difference is only ~20%.

http://www.city-data.com/neighborhood/Mission-District-San-F...