> If I were to start a new version of Opa, I would probably force developers to split their code manually between client, server, database and location-independ

> If I were to start a new version of Opa, I would probably force developers to split their code manually between client, server, database and location-independent (presumably by putting stuff in distinct directories) Exactly how GWT worked (and still does!). there's a server/, client/ and shared/ directories... but all code is written in Java.