Worryingly, Nice was previously bookable at 4x weekly for S17 but has now been removed, with nothing showing beyond October this year. What's going on there?
I would suggest a little matter of a lunatic, a truck and a Bastille Day parade not 6 weeks ago may be a contributory factor. These days people are so risk averse that such an attack will put people off going. One wonders how Spain would have fared in the 1970s and 1980 when ETA were active in Spain, and around holiday resorts.
I blame insurance companies and lawyers.