But you reach a point where the Austrian prefer to keep Italy than hold on territories they clearly can´t protect.No, I think if the entire Austrian Netherlands couldn't be taken then the French would take some parts of the ANL (Ypres, Tournai, Courtrai, Mons and parts of the county of Hainault, or maybe that entire county). It would anger the others much less to see most of the ANL remain Austrian and would be much easier to defend and incorporate into France. That's actually more similar to the way they slowly took parts of the Low Countries, bit by bit, rather than the entire region at once.