Jakarta doesn’t have one metro line. It has 9 lines which it variously calls light rail, commuter trains, etc. but are metro lines in all but name, in terms of frequency, infrastructure, and service patterns. It’s not quite Beijing or Tokyo, but it’s also not as wealthy as either city.
Despite its name, Jawi wasn’t used all that much in Java – it had always been more popular in the Malay peninsula. Java, as with many parts of Indonesia, used Brahmic abugidas descended from the Pallava script of Southern India (just like the Thai and Khmer scripts). Latin was chosen to write the Indonesian language for the same reason Malay was chosen as the language’s base: it was a politically neutral choice to unite a diverse archipelago.