-----Original Message-----
I think it is important to think about new companies. They will very probably require some IPv4 address space during the transition from IPv4 to IPv6. I think the whole community will be in a lot of trouble if we make a policy that makes it impossible for new entrants to participate in a dual-stack world.
A legitimate concern. But: 1. address transfers might make it possible for them to acquire v4 addresses 2. by "new companies" do you mean "companies with no prior allocations" or literally just "new companies." The two categories overlap but are not the same. If you create a category of [new/no prior assignments] companies and the address shortage becomes severe, can you foresee ways of gaming that definition to acquire privileged access to addresses? e.g., can an incumbent ISP create a wholly-owned subsidiary (which might in fact be a legitimate "new entrant" into a market by some economically-relevant definitions) and qualify as a "new company"?