IETF's current policy makes the I-D series more valuable than it would
be if [...] I-Ds did not expire at all
I see your point, but there's an easy solution. If there are two
interfaces (or one, with a checkbox), and the default is to search only the
I-Ds under 6 months old, then the noise level doesn't go up unless you
decide you need it to.
actually my point isn't about the noise level associated with having
additional documents returned in a search - it's about the I-D series
being more useful for particular purposes *precisely because of
mechanisms that are designed to limit, but not totally prevent,
use of old I-Ds*.