That’s a shorthand for modern processes. Older process technology was made before 300mm wafers were standard, and retrofitting old processes to use larger wafer

That’s a shorthand for modern processes. Older process technology was made before 300mm wafers were standard, and retrofitting old processes to use larger wafers is generally considered to be not worth the cost since all the tooling is depreciated and paid for in 200mm or smaller wafers. Anything made today from the ground up would use 300mm wafers, though. Even slightly older process nodes (55nm, for instance).