I've been hired as both a Ruby on Rails and Go developer without prior experience, and managed just fine in both case. Of course there's a bit of ramp-up time, but it's not that bad.
I'm not even an exceptionally talented programmer: just a competent one. Of course there are real differences between languages that matter, but at the end of the day ifs are ifs, ints are ints, functions are functions, etc.
That said: there are some reasonable scenarios when you want to hire someone with prior experience; for example as a first or second hire it's probably a good idea in most cases, or if you really need someone who can hit the ground running.
I'm not even an exceptionally talented programmer: just a competent one. Of course there are real differences between languages that matter, but at the end of the day ifs are ifs, ints are ints, functions are functions, etc.
Relevant old joke: https://www.reddit.com/r/ProgrammerHumor/comments/4k994j/if_...
That said: there are some reasonable scenarios when you want to hire someone with prior experience; for example as a first or second hire it's probably a good idea in most cases, or if you really need someone who can hit the ground running.