[adenozine]

It’s not quite arbitrarily. That’s an uncharitable definition. Python a) handles function arguments in a way that would make recursive functions awkward to use and b) cares about stacktraces being meaningful, so TCO would be a worse tradeoff towards that end as well.

There’s trampolines in almost any programming language to implement recursion if necessary, and python has itertools to build what Scheme calls streams, for arbitrary computation.