I think gunshow was voicing a general concern from the manufacturer/service tech side of things -- not necessarily directed at anyone specific or their level of understanding/experience.
With each advancement in automotive technology, there are changes made in the manufacturer side that allows for the "dealer only" service requirements. These are regulated by ISO and SAE standards, which also require specific relationships and abilities available to aftermarket companies.
SPA cars, FlexRay, and other recent changes in the Volvo world are no different.
When the VCT 2000 was replaced by the DiCE unit, it was not made readily available to consumers -- by design. CAN advancements, MOST, as well as many other technological changes on the "computer" side of the vehicles, were meant to be "serviced by the professional". This allows for a certain return on investment for the manufacturers, however, due to limitations, these things become available to aftermarket companies, and thus, the end consumer.
As has previously been stated, by the time these cars are all out of warranty and the aftermarket has caught up, I'm sure many, many possibilities that now seem far fetched to the present day "I have to take it in for everything" consumer.
Any technician that lived through the SPA car debut will naturally be hesisitant about untrained individuals doing VIDA only tasks on these cars.