What is the benefit to having this mirror option defaulted to off? Wouldn't most use cases want it on?
Which option are you referring to? There were several that he mentions just in the first few minutes. A time stamp and/or a screenshot of which options would help here.
Hi Ken,
That is a good question.
They are the default settings for all modifiers in Blender.
Yes it's beneficial to have them on for most of the modifiers, but for some it can come at a huge computational cost. So that is left to the user to decide when/if to enable them.
My understanding is that all of them have the same default (disabled) so there is consistency across the board.