Kraken is going to make some major upgrades so they are intended to solve the problem. But they should have been prepared for this increase of clients. Binance have done upgrades yesterday and it took them less than hour. Personaly i've transfered some funds from bittrex to binance. But frankly speaking noone should forget about diversification. It means that you should divide your assets between at least two exchanges and some cold wallets for sure. Don't put all your eggs in one basket. The gold rules of financial risk management.

Kraken incompetence for sure.