I love how you mischaracterize it. All measurement systems are as artificial as Esperanto. So that analogy is meaningless here. But as far as popularity goes, the SI system is like English and the imperial units are like Esperanto. Never mind the age difference. So you're better off choosing the system that maintains consistent prefixes and units without arbitrary conversion constants. And that's what the rest of the world does. Meanwhile, enjoy the company of Myanmar and Liberia!