Coming from Java I loved Python's conciseness and convention, but as my codebase got larger I hit a maintainability wall where it was impossible to refactor reliably enough to keep the code clean and framework upgrades were always a massive task. Then I discovered Scala which combines the conciseness of Python (and allows you to write in a very "plain English" style if you want to, with the optional no-brackets call syntax) with the safety (and runtime and library availability) of Java.