- Do you really write exception safe code?
Well, I certainly intend to.
- Are you sure your last "production ready" code is exception safe?
I'm sure that my 24/7 servers built using exceptions run 24/7 and don't leak memory.
- Can you even be sure, that it is?
It's very difficult to be sure that any code is correct. Typically, one can only go by results
- Do you know and/or actually use alternatives that work?
No. Using exceptions is cleaner and easier than any of the alternatives I've used over the last 30 years in programming.