I just want to know if we can expect IPv6 to devolve into 1280 standard mtu and at what gigabit rates.
1280 is the minimum IPv6 MTU. If people allow pMTU to work, aka accept and process ICMPv6 Packet-Too-Big messages everything will just work.
This whole thread is about people who cannot be bothered to know what they are filtering and that they might just randomly block PtB as they are doing with IPv4 today. Yes, in that case their network breaks if the packets are suddenly larger than a link somewhere else, that is the same as in IPv4 ;)
But, it is not necessarily the person that filters the PTBs that suffers the breakage. It is the original source that may be many IP hops further down the line, who would have no way of knowing that the filtering is even happening. Thanks - Fred fred.l.templin@boeing.com
Greets, Jeroen