Setting array length to 0 discards reserved allocation?

[Andrew Godfrey via Digitalmars-d]

Reminder: The PR is ready for review:

https://github.com/D-Programming-Language/dlang.org/pull/623

Jonathan has summarized his position in the commments.
What do the rest of you think?
H. S. Teoh, Jakob, Ali, Marc, Dominikus, Chris -
your impression of whether this clears up the confusion would
help round out the feedback.