It's honestly impressive the amount of coding that young people do from their phones. There is a very healthy healthy community of those who have some solid environments on their (mostly Android) devices. Whats funny is that this was the dream of the One Laptop per Child non-profit that was solved by the flush of ARM devices instead of donor dollars (ftw free market!)
I work at Railway and a lot of our younger, international users use Railway from their phones (usually in class) and it's quite impressive. Honestly, such a fan of Repl.it its why I am a customer of their service and this is a step in the right direction for the dream of the universal runtime.