Hello jimmy
I have been flying behind two stroke now for over 20 years or so with out a single problem yes I beleive all engines will fail but good engine management practise and always fly with a safe landing area in yor sites will keep you happy with your choice of engine , they all stop just a matter of when and where !
But I beleive a two stroke is as good as any if treated right my two bob worth .
Doug
Learnt in a two stroke and still fly one 20 year or so later