You probably know it, but Common Lisp May be a bit dated but it’s extremely modern in terms of features since you can add almost any feature to the language in

You probably know it, but Common Lisp May be a bit dated but it’s extremely modern in terms of features since you can add almost any feature to the language in libraries! I use it exactly because it’s old and battle tested and I don’t need to wait years for a language designer to give me a feature , I can just add it myself, though these days it has everything done already!