Sanctions on elites have not caused regime change in other authoritarian regimes, we have even less reason to believe that it would happen with this one.
Russian people need to see that they are at a crossroads, and if they don't act in this narrow time window by organizing and protesting by the millions, they may indeed end up like North Korea.
Still didn't end up in an overthrow of the regime, but rather regime recognizing that writing is on the wall, but definitely could be a case in point.
I agree we shouldn't try to cut off the Russian internet, they need access to non-government-sanctioned information. But the economic sanctions need to apply to everyone in the country - if nothing else, it reduces Putin's ability to wage (expensive) wars. It sucks.