Unlock the Editor’s Digest for freeRoula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.The sight of OpenAI chief executive Sam Altman and French President Emmanuel Macron being mobbed by techies at Paris-based Station F recently was a reminder — if any were needed — of the business incubator’s powerful gravitational pull.A former rail depot converted into a 34,000 sq metre workspace, the site was once more used to hosting rolling stock and a few pigeons than d...