Why has Renault signed Fernando Alonso for a return to Formula 1 in 2021 and beyond? A better question might be, 'why wouldn't it?'.
This, after all, is one of the greatest drivers in the history of F1. If a team seeking to return to success could get hold of the sort of performance that Alonso can bring - performance that, for example, could almost single-handedly make the second-slowest car on the grid finish sixth in the constructors' championship only two years ago - why would that team not take the opportunity?
That's what you get with Alonso - a driver who will coax performance out of a car that almost no other driver can.