Ash wood might be good, I hear it's used in hammer handles. And, it makes great firewood, even when it's green, if it's hot enough.
But the trees are a terror. They get big, fast. They spread like crazy if you let them. And, worst of all, they have the Roots of Doom. Close to the surface, fast growing and they tear up sidewalks, and streets, in asphalt or concrete. And they invade the pots of the little palm trees you put under them.
Imagine the Huns as trees. That's ash trees here in lowland Southern California.
And, to top it all off, they break in winter storms here. Ash trees here have a very brief deciduous season, from about Thanksgiving to Christmas, which means they're in full leaf during most of our sometimes stormy rainy season.
The wood is hard, tough, and very very brittle.
When I lived in LA back in the late 1990s, there was a giant ash tree in the back yard, and a big limb broke off in the middle of a storm; I was standing about 20 feet away. It was somewhere between two-and-a-half and three feet in diameter. The tree was massive, too, bigger than the one in the picture above.