Fit-to-width was considered as harmful feature that confuses many beginners and non-experienced users
"So, starting from this fresh base, we decided to carefully consider how to build up Opera again: over the years, Presto-based Opera had become overloaded with features, a number of them confusing rather than helping our users — you can’t imagine how many reports we’ve gotten from users telling us that their favorite site was broken, simply because they had turned on fit-to-width by accident, for instance."
Google "The vision behind Opera 15 and beyond" text for details.
Features and options is not about the new Opera.