Yep. Anything less than 10 years old is new & untested, anything less than 20 years old is new but probably decently common. Give a tool about 40 years to reach

Yep. Anything less than 10 years old is new & untested, anything less than 20 years old is new but probably decently common. Give a tool about 40 years to reach mass adoption (to the point that earlier tools aren't seen often).