Any restriction in travel will help to slow the spread of the virus. If you look at Europe, a sizeable number of cases outside of Italy are still travel related

Any restriction in travel will help to slow the spread of the virus. If you look at Europe, a sizeable number of cases outside of Italy are still travel related. Stopping all travel is one of the key measures to keep infections local. I'm not saying the measure suffices. Obviously domestic travel is also a big issue, as is travel from outside the Schengen area. But being one of the people affected (currently in Schengen), I still believe this is a right step. It might not slow infections down enough but it will certainly prevent many cases. Also, it will remind people how serious the situation is.