The new `getrpcinfo` shows a list of the active commands and the duration each command has been running. This sounds like a good place to report a completion percentage for any command doing a blockchain rescan, to solve [this problem](https://bitcoin.stackexchange.com/q/83236/90721).
for (auto it = group.m_outputs.begin(); it != group.m_outputs.end(); ) {
                const CInputCoin& coin = *it;
                CAmount effective_value = coin.txout.nValue - (coin.m_input_bytes < 0 ? 0 : coin_selection_params.effective_fee.GetFee(coin.m_input_bytes));
                
                if (effective_value > 0) {
                    group.fee += coin.m_input_bytes < 0 ? 0 : coin_selection_params.effective_fee.GetFee(coin.m_input_bytes);
                    group.long_term_fee += coin.m_input_bytes < 0 ? 0 : long_term_feerate.GetFee(coin.m_input_bytes);
                    group.effective_value += effective_value;
                    ++it;
                } else {
                    it = group.Discard(coin);
                }
            }
            if (group.effective_value > 0) utxo_pool.push_back(group);
        }
        
        CAmount not_input_fees = coin_selection_params.effective_fee.GetFee(coin_selection_params.tx_noinputs_size);
        bnb_used = true;
        return SelectCoinsBnB(utxo_pool, nTargetValue, cost_of_change, setCoinsRet, nValueRet, not_input_fees);
    } else {
        
        for (const OutputGroup& group : groups) {
            if (!group.EligibleForSpending(eligibility_filter)) continue;
            utxo_pool.push_back(group);
        }
        bnb_used = false;
        return KnapsackSolver(nTargetValue, utxo_pool, setCoinsRet, nValueRet);
    }
}
bool CWallet::SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAmount& nTargetValue, std::set<CInputCoin>& setCoinsRet, CAmount& nValueRet, const CCoinControl& coin_control, CoinSelectionParams& coin_selection_params, bool& bnb_used) const