poudriere-devel and SAVE_WRKDIR= or -w use for overall bulk build vs. large temporary space ports like rust: allow avoiding?

ports-mgmt/poudriere-devel got support for TMPFS_BLACKLIST and
TMPFS_BLACKLIST_TMPDIR in order to avoid trying to use huge
tmpfs spaces.

Would it be appropriate to also allow avoiding saving possibly
huge wrkdir's when such ports fail to build?

DONOT_SAVE_WRKDIR_LIST=". . ."

?

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Mark Millard
marklmi at yahoo.com