[weatherlite]

> people massively over estimate how competent they are in a language.

Or maybe they were just really mediocre? I can compare myself to myself - I simply know that I'm a better Rubyist than I was 7 years ago. Not just a better Rubyist, a better software developer in general. But sure I can see that maybe some people don't have a passion for the craft and then they kinda stop learning and just get by with what they know. You can continue being mediocre for quite a long time if you can bullshit people - but I don't think that's a typical type in our industry. So I do think your experience is anecdotal. The really great Rubyists I know all have lots of experience - at least 5 years and usually it's well over a decade (I'm thinking of Tenderlove/Jeremy Evans/Sam Saffron etc etc). Btw they're not just great Rubyists they also understand software, the web and even low level stuff quite well, so they're great overall engineers. Sure some bright people can get to that level faster - but that's very rare for mere mortals. It takes a lot of hard work and a lot of time usually, like any skill.

I will say though that for many routine tasks you don't have to really be senior - e.g implement some new end point that talks to a model where you pretty much copy paste from the existing code base, for these types of tasks there won't be much of a discernable difference between a junior-mid and a senior. Senior make a difference in the more complex stuff.