[trealira]

In the 1960s, there were still 70 year olds born in the 1890s, and 80 year olds born in the 1880s, so it still doesn't seem like a good decision even for something written back then.

[nikau]

In 1966 a 7.25MB drive cost $25,510.

In todays money that's $246,316.70.

So it would have cost 6 extra cents for every date entry.