Old Blog Entries and dead links

You have probably read about the bad persistence of the web. Today I noticed by chance two dead links in my blog, and fixed them.
I don’t really want to run after dead links in my blog, as there must be 100s of external links already, of which i guess at least 10 are already broken. And if i start to reedit my blog entries, I am tempted to rewrite them.
So I will leave them broken as historic relicts in future. Maybe I should try to avoid linking and copy the relevant texts (where possible without danger of copyright infringements) into the entry.