Alex Waygood <alex.wayg...@gmail.com> added the comment:

I sense we'll have to agree to disagree on the usefulness of NamedTuples in the 
age of dataclasses :)

For me, I find the simplicity of the underlying idea behind namedtuples — 
"tuples with some properties bolted on" — very attractive. Yes, standard tuples 
are more performant, but it's great to have a tool in the arsenal that's 
essentially the same as a tuple (and is backwards-compatible with a tuple, for 
APIs that require a tuple), but can also, like dataclasses, be 
self-documenting. (You're right that DoneAndNotDoneFutures isn't a great 
example of this.)

But I agree that this shouldn't be a priority if it's hard to accomplish; and 
there'll certainly be no complaints from me if energy is invested into making 
dataclasses faster.

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<https://bugs.python.org/issue43923>
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