Years of experience is a farce typically made up by HR folks that have zero understanding or clue of the detail's they're hiring for. Case in point for people looking for "10+ years of rails experience." Secret tip: 1) Apply anyways. I got jobs just by showing interest and a willingness to learn anything. 2) Build cool, publicly usable and visible projects. Show your versatility to build and ship different kinds of p…
But yeah, it's a poor measure, plain and simple. Someone who tinkers with Rails one week out of each year could soon claim eight years of experience, even though they'll have no experience compared to someone who has used it in their full-time job over the same number of years.