Not at all. The exercise is trivially extended to allow for selecting 1,000 or 1,000,000 items from the set. This can be useful if you want a reprsentative samp

Not at all. The exercise is trivially extended to allow for selecting 1,000 or 1,000,000 items from the set. This can be useful if you want a reprsentative sample from the stream, but require a well-defined and limited number of samples.