i understand using several cash accounts to prevent overtrading for people still trying to control risk or avoid overtrading.
One cash account with the money you are willing to risk would work better. Having 5 is just silly if they are all equity cash accounts under the SIPC limit. I could make an argument for 2.
i just opened multiple accounts to test brokers (platform, margin, order execution, deposit methods). But i don't trade with multiple accounts