So it looks like Sony are putting Driveclub into retirement in August with all services off in a year.
https://www.playstation.com/en-gb/legal/gameservers
Obviously 1P will still work if you have it but if the challenges and etc. are all gone.. I was never very good at it but I think it really was a very good game overall that never really recovered from a terrible launch. It’s a shame, but five years is a decent lifespan for an online game I suppose.