Hello Richard,
you wrote a good argument for being more optimistic than I am and a
generally
interesting discussion. However, the greatest argument for some
optimism was
in a response to John Spencer,
in which you stated:
"The commercial digital repositories that I am aware of charge a
per-chunk, per-time-period fee and if you don't keep paying your data
goes to the bit bucket in the sky. The university systems I am
familiar with have a higher cost-of-entry, but for a one-time fee
they are storing your data in perpetuity"