I think Raymond Hettinger is called out specially here because he did a well known talk called [Modern Dictionaries](https://youtu.be/p33CVV29OG8) where around 32:00 to 35:00 in he makes the quip about how younger developers think they need new data structures to handle new problems, but eventually just end up recreating / rediscovering solutions from the 1960s.

“What has been is what will be, and what has been done is what will be done; there is nothing new under the sun.”

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kzrdude an hour ago | parent | next [-]

I think he was always reluctant to add features, and his version of Python would be slimmer, beautiful, and maybe 'finished'. His voice is definitely not guiding the contemporary Python development, which is more expansionist in terms of features.

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sesm 2 days ago | parent | prev [-]

Since that time HAMT was invented and successfully used in Scala and Clojure, so this talk didn't age well.

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Someone 2 days ago | parent [-]

Wikipedia (https://en.wikipedia.org/wiki/Hash_array_mapped_trie) links to the paper describing HAMT (https://infoscience.epfl.ch/server/api/core/bitstreams/f66a3...) and claims that is from 2000. That talk is from 2016.

	▲	zelphirkalt 2 days ago \| parent \| next [-]
		Do you know of any implementation, that is well annotated/commented, so that it is easy to understand?
	▲	ndr 2 days ago \| parent \| prev [-]
		HAMT weren't immutable/persistent until Clojure though: https://en.wikipedia.org/wiki/Persistent_data_structure#Pers... Still well before the talk.