Look on the bright side: we stand a good chance of destroying civilization through climate change first. The handful of survivors living off bugs and grass in mountain caves won't need to worry about brain chips.
I'd be fine with an isolated system. It would be nice to be able to store large amounts of data and do difficult calculations in my head. Those things don't need Internet access.
A brain machine interface could also be used in cases like blindness or deafness to provide alternatives to those senses, so that would be a huge boon.
But I agree with the others, floss or beat it. And no direct Internet connection.