In my experience, it's not all that standard. There are still many companies advertising exclusively for 2+ years experience, even in very niche areas where few people would already have relevant experience.

I think there might also be a different between interns and juniors. Where I'm from, interns are people who are hired specifically for a short period of time, often people still in their education. This is in comparison to juniors who are expecting permanent, full time employment. The amount of training and responsibilities given to juniors is much greater than that given interns because there is a much greater return expected.