There’s just something about Cannes. No film festival can rival it for delivering old-school Hollywood glamour. And the 76th edition hasn’t suffered from a lack of star power during its first half, with Leonardo DiCaprio, Julianne Moore and Natalie Portman all shining on the red carpet. But Cannes isn’t just an opportunity to see the biggest actors on the planet on the biggest stage in moviedom. It’s also a chance to take stock of the industry and the challenges it faces. There’s no graver one, certainly, than the Writers Guild strike that’s put the TV and movie business in a...