If you're not being heard by your vendor, you're not yelling loud enough.
Or you aren't big enough of a customer. I was at one manufacturer within the past few months and asked about the lack of v6 support at layer 3 in one of their product lines as I had an application for that line but the lack of v6 layer 3 disqualified that solution. I was told that $HUGE_CUSTOMER had placed $HUGE_ORDER and was needing layer 2 features as their highest priority and so that is where they were focusing right now and that layer 3 ipv6 would be out later this year. They did say that it was getting more difficult to sell the gear without the layer 3 features and that the "real soon now" excuse was having trouble getting any traction with potential customers but right now the largest dollar amount of business hinged on layer 2 features.