zlacker

  One of Wikipedia's power users, [...] Assuming he
  doesn't sleep or eat or anything else [...]
  that's still one edit every four minutes.

When your hobby is replacing hyphens with en dashes [1] and removing errant newlines [2] I doubt it takes 4 minutes per page.

[1] https://en.wikipedia.org/w/index.php?title=Plymouth_Brethren...

[2] https://en.wikipedia.org/w/index.php?title=Raymond_Ramazani_...

>>michae+(OP)
probably uses a bot

>>buboar+c1
As the original Reddit thread pointed out, a fully-automatic edit system is required to use a separate bot account. Edits like this, is called a semi-automatic edit, or "cleanup tasks", or "maintenance". It includes adding proper categories, fixing links and typos, correcting some deprecated Mediawiki syntax and templates to standard code, etc. Editors can use mulitple tools to do this job, with a mouse click and proper regular expressions, you can edit a dozen of pages.