TSP is almost sacred amongst the government and military crowd. Rightfully so, TSP does give us great returns and superior management.
However, does it give us the control and flexibility of having a brokerage account?
Once you reach the limit of government matching, should you open a brokerage with your remaining investment funds?
It depends on how involved you want to be with your portfolio. If you want to close your eyes, TSP is still your best bet.
If you want to read and study investing daily, opening a brokerage can help you build a dividend portfolio you can use throughout life. Especially important is the time between military retirement and TSP withdrawal (ages 38-59).