I've now made it a rule to completely ignore this phrase and assume they require the technology, but why do companies do it, and has anyone ever got a job without the experience in the technology they want?
It's the antidote to people not applying for positions whose job-ad is written by HR and stuffed with unreasonably large lists of "essential technologies". "Hey, this job sounds reasonable, and even if they do not expect me to know GLURAK, I am actually quite proficient in it with 5 years of experience, I will ace this."
Well the answer of course for anyone would be you shouldn't, you should hire the better one.
So if you don't have Go experience and someone applies who does, you're gone.
But if no one with Go experience applies maybe you got a shot.