SAFU can easily take care of this problem and if ever there is still some gap then I think Binance can also take a dip at their own funds.
SAFU fits in the category of Binance's own funds. They are not obligated to actually allocate them to hacks and whatnot, it's just what they promised, but we have seen many exchanges break their promises before.
I wonder how much Binance has sitting in its SAFU fund, and whether or not a part of it is sitting in altcoins that need to be converted to Bitcoin. Maybe they have already been selling alts to Bitcoin in the last few days.
If they want to recoup their $40 million loss they are better off launching a few more IEOs because these are the real money makers for them, or list some random shitcoins and tokens for an exorbitant fee.