One challenge with date based is that it can make your API seem old if it’s real...

One challenge with date based is that it can make your API seem old if it’s really stable. For example, see PagerDuty’s v1 events API:

Customers there would sometimes ask if that API was still relevant given its date is 9+ years old.

In Shopify’s case, where there are quarterly version bumps and deprecation over time, date based makes better sense.