But at one point, many of the old school stats were new analytics.
No one was keeping track of ERA in the 1890'. Pitchers were just evaluated by W-L. But then that changed with this weird new stat that involved 2 decimal places and required math. Think that was just embraced right away?
And slugging percentage took over 40 years to be recognized as an official stat. My baseball cards growing up didn't have it on there...