The idea that there are already devices out there designed for a new protocol was considered an advantage of the TUBA protocol to replace IPv4 before v6 was cho

The idea that there are already devices out there designed for a new protocol was considered an advantage of the TUBA protocol to replace IPv4 before v6 was chosen: "The reviewers generally felt that the most important thing that TUBA has offers is that it is based on CLNP and there is significant deployment of CLNP-capable routers throughout the Internet." [0] [0] https://www.potaroo.net/ietf/idref/draft-ipng-recommendation/#page-17 https://www.potaroo.net/ietf/idref/draft-ipng-recommendation... Of course these days nobody remembers either TUBA or CNLP...