I used to enjoy flying behind a Rotax.
Then one of my co-owners was crossing the channel when it failed. He and his wife were lucky and skilled to survive.
He still flies behind a Rotax.
One of the other co-owners never flew again -behind any engine.
I fly behind a 320 - but would have a rotax happly if it had the power I want. (I use an inmersion suit over water)
At the end of the day we all make our own choices.