re: Hubble DVD
LOL..
"I still think the primary lesson of Hubble (that human servicing of assets is a powerful tool and must be incorporated into future space architectures) remains unlearned."
I think if anything it has demonstrated that - using current space access infrastructure at least - the on orbit upgrading and maintainance of assets is hiddeously expensive and a complete false economy (in most cases it would be cheaper to simply fly a replacement on an EELV).
That the Webb scope is going to a place where it can not be serviced is an excellent lesson learnt.
Doug