Stack orientation is an implementation detail. For example, Joy can be implemented using rewriting – no stack. This is why some prefer to say “concatenative” or “compositional”. With quotations and combinators you can code without thinking about the stack.
Expressing yourself with pure composition and without locals or named arguments is the key. It’s extremely succinct with no syntactic overhead. Composition makes it very easy to factor out redundancy and to “algebraically” manipulate your code; boiling it down to its essence.
Once you’ve fallen in love with this point-free style you’ll become annoyed by even the slightest composition syntax in other languages (even if just a dot). In concatenative languages, white space is the composition operator.