The engine that SpaceX started out-with was not very impressive, and it was also not just a simple copy of an existing engine. And the Merlin now is a engine f

The engine that SpaceX started out-with was not very impressive, and it was also not just a simple copy of an existing engine. And the Merlin now is a engine far beyond what any other US engine ever managed in a number of metrics. Was it a bit easier to develop a kerlox engine for SpaceX in the US as compared to doing it in Bangladesh and starting fresh with every bit of technical knowlabe about Kerlox, of course it was but SpaceX went from a pretty simple starting point to an incredibly advanced rocket engine that they are flying now. Putting the empasis on well somebody else has done a Kerlox engine before, rather then SpaceX designing and mass producing and incredibly advanced Kerlox engine is just downplaying what they achieved.