Because they have infinite time and money to finish it. They have achieved what many big publishers cannot, they have effectively turned a game into a bank and everyone trusts them and likes them for it.

Does it have transition animations or is it actually smooth? Asking from Elite Dangerous where the transition sequences feel pretty immersove to me. Each solar system is an instance with a wormhole jump between. Sublight and FTL have a charge/dropout sequence. The worst is switching between ship/rover/foot where the screen goes black and you hear footsteps. So what does SC do?