My default for anything: show me everything and give me the opportunity to filter it myself. I do the same thing for my customers in everything I build for them. This does several things:
a. It adds dimension. Whether 5% or 95% of the content is already dead, it's better to see it yourself than have someone give you that percentage.
b. It adds perspective. Actually seeing what content has become dead helps better understand the entire landscape.
c. It adds power. It's always more powerful to know what you're filtering.
d. It adds appreciation. Each tree means more after you've already seen the whole forest.