This would save young Americans from going into crippling debt, but it would also make a university degree completely unaffordable for most. However, in the age of the Internet, that doesn’t mean they couldn’t get an education.
Consider the long term impact of this. There are a lot of different ways such a situation could go, for better and for worse.
I presume that anywhere where interest-free loans are offered, they are offered by that country’s government. Canada, for example, as of April 1st 2023, offers federal student loans interest-free. Depending on the province, some may not have interest on provincial loans, as well.
That’s the only way it makes any sense.