It seems like modern languages adopt more and more ideas from functional programming as time goes by (garbage collection, closures and higher-order functions, p

It seems like modern languages adopt more and more ideas from functional programming as time goes by (garbage collection, closures and higher-order functions, parametric polymorphism, immutable values, algebraic types). Modern languages designed for general-purpose use are mostly hybrids, and the functional influence has been steadily growing over the decades. What influence has Forth had?