Java is a huge plus over Python for me, namely type checking and ease of deployment. I don't know either jailer or condenser, but I know that jailer@java has a

Java is a huge plus over Python for me, namely type checking and ease of deployment. I don't know either jailer or condenser, but I know that jailer@java has an unreasonable better change to have less bugs then condenser@python. Like you already noticed, condenser produces errors during run time.