It’s a good idea to take estimates like this with a grain of salt. Schedules for spaceflight can slip with little warning (even this latest test was delayed by a day). And there’s no denying that Musk’s estimates are sometimes optimistic – just look at how long it took Falcon Heavy to translate from a concept to an honest-to- goodness launch . The escape demonstration was the last major test before the crewed flight, though, so there isn’t as much of a chance of delays as there has been in the past .
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