> Loops where you join all the threads that are supposedly finished are usually troublesome. If somebody gets stuck, the joiner stalls. Clean exits from program

> Loops where you join all the threads that are supposedly finished are usually troublesome. If somebody gets stuck, the joiner stalls. Clean exits from programs with lots of channels are troublesome. Channels with multiple senders don't close until all senders exit, which can be hard to arrange when something detects an error. I wish join-with-timeout was a more common/supported operation.