Gavin Newsom spent more than $450 million on a regional emergency call system that flopped, and was canceled. Meantime, the old system risks “catastrophic failure.” California once built massive infrastructure projects — dams, highways, and aqueducts — that were the marvel of the world. But those days are over. Under Gov. Gavin Newsom, California has been unable to complete, and hardly able to begin , construction on its high-speed rail system. Many other government projects are beset by delays, cost overruns, and dreams that never materialize. Illustration of a California High-Speed Rail train. California High-Speed Rail Authority Though the bullet train has become the most famous symbol of this dysfunction, the overhaul of California’s 911 emergency line is an even more important system failure.…