Exceptions are really no less complex than return values, and they do not (easily) play nice with asynchronous and lambda/functional programming models. Witness

Exceptions are really no less complex than return values, and they do not (easily) play nice with asynchronous and lambda/functional programming models. Witness their near abandonment in JavaScript for example. I like Go mostly the way it is. Its simplicity is genius. Anything added should be considered with great care.