How good is it for long-term gambling results by changing strategies repeatedly?
For skill games it makes sense only in specific situations. So no repeteadly.
In casino games it's bullshit, and the way you put it, it seems to me that you mean the latter, because you don't make a distinction. What usually happens to people in casino games is that they change the “strategy” and because of pure variance
andthey come up with positive results and then they believe that what they have done has some relation to the results, which is bullshit.