> Brian E Carpenter wrote: > The transition model in 1995 was based on the assumption > that vendors and ISPs would support dual stack globally > well *before* IPv4 exhaustion. The fact that this did > not happen is the problem. Indeed. Unfortunately the NASDAQ went from ~800 in 1995 to peak at 5050 on March 10, 2000, leading everyone in the Internet thing for these 5 years to get used to unlimited money pouring from the sky. In the economy at the time, the cost to dual-stack seemed bearable. After it fell back below 2000 in 2001 and below 1500 in 2003, the game changed. The ISP business model changed (at least the AOL-like model); the customer business model changed too. Today NASDAQ closed at 2401.91, less than half what it at peek was 10.5 years ago. No bucks, no Buck Rogers. Michel. _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf