SS lines will also have much better modulation and pedal feal then rubber lines, but only at or near threshold.
The caution with SS lines is that dirt can work their way between the braid and the hose under it, causing abrasion and potential failure. This will be a slow process and requires periodic inspection of the lines for weeping. Not a big deal if you pay attention to them.
If you are tracking your car, you should be doing a brake job before and after to change pads. This is a good time to do this.
The other caveate is that SS lines are often not DOT approved, which can cause issues if you get into an accident due to brake failure. As long as the lines have not failed, there shouldn't be an issue, but forwarned is forwarned. Personally, I am willing to take the microscopic risk for the benefits SS lines bring.
Oh, my suggestion on the fluid is not in dispute with the orginal post. I'm making the suggestion to make it easier to bleed brakes.