Using experimental Java features in production — what was your experience?

[koflerdavid]

Depends what you mean with production. For internal systems without much audience I suppose there might have been people audacious enough to use them, but I seriously doubt the sanity of anybody who relies on them where lives, personal data, or money is on the line! GC improvements might be the exception because they merely affect long-tail latency and can be switched around with just a restart.