Just wanted to second this. It really depends on your velocity -- 6 month consulting gigs or 5+ year stints with a single company. After five or so years of short-term consulting for example you're looking at 20+ entries for work history alone, not counting mentionable side projects, service, other items. And you're a tech candidate so it's got to be keyword-optimized. Recruiter X wants it in MS Word, employer Y wants it in their proprietary ATS, employer Z you have direct access to the devs and can use the LaTeX "secret handshake". Then the anonymized HTML version for your blog, etc. So you get this explosion of formats and, if you edit each format manually, a quick resume update can take all day. Let alone a redesign.