Why would you only be trading with half your funds? You make trades in both accounts on any day. If you have an outage you use the remaining account to do the hedging for the account that is down. It works fine with equities. Some firms offer free news, other firms offer interest on your idle balances. You can use different features from each system to achieve your objectives.
Might work for simpler trading methods or discretionary but with algo trading that's a massive amount of work. Concurrently managing two separate broker accounts, comparing stats and holdings, being in sync every second of the day. I can't even see how it could be done as one side can go margin deficient while the other has plenty left. For discretionary trading and a smaller number of positions it's straightforward, that's for sure.
Oh man, this is hilarious. My trading framework is more advanced than RH because it can handle leap years fine
They still seem to be experiencing some issues, my wife that uses it all the time says it works “barely and getting stuck”. Here is Robinhood real-time status: https://status.robinhood.com/