When buildings get older they become consumed with self-doubt. Trendy when built, suddenly they're faced with the possibility they may be obsolete. Up and down our avenues, if you listen closely, you can hear the concerned mutters between sagging roofs and creaking floors: Are my windows too big? Too small? Is my mechanical unit showing? Should I have gone a different route, become an office tower instead, or an art museum? Will old age - and the squatters - be kind? How long until I'm back in style again, and someone comes to lovingly restore me to my former glory?