One of the challenges is that there probably is no way to undo the sanctions/Russian reactions to the sanctions. Sanctions started rewriting supply chains from the moment they went into effect. This could mostly be undone now, but the longer they are in place, the more permanent the rewrites become.<p>The Russian reaction also prevents a lot of capital from returning. They are talking about seizing assets, openly defaulting on bonds (rouble payments at the official exchange rate), have indefinitely closed the stock market, and seem set to start printing roubles. They will remain "uninvestable" to Westerners, as their risk profile has permanently changed.