Thank you SplineDrive for the information. But is that information from a recent press release? It’s been 17 months since first flight.
Actually, in three days it'll have been 19 months. On August 28 SansAnhedral posted a quote from Graham Warwick (a reliable source) indicating that SB>1 had flown 20 hours. So given the nearly two months that have elapsed since then, three more hours would be in line with its average flight rate (actually it's somewhat better than their average rate) since first flight.