Good point about compile time. Template metaprogramming can definitely impact build performance, especially with recursive template instantiation.

From what I've seen in the repo, this approach might actually help with compile times in the long run. The Lisp-style syntax could enable better template caching and memoization strategies compared to the nested template<template<...>> patterns we usually see. Plus, cleaner metaprogramming code means developers are less likely to write deeply nested recursive templates that blow up compile times.

Would be interesting to see some benchmarks comparing compile times for equivalent functionality written in traditional C++ template style vs this approach.