Well, if there is to be a replacement for the FT817 we are likely to hear about it this weekend at Dayton. This is the biggest amateur event in the world.
There was a rumour about this last year. If there is no announcement then I think Yaesu will have missed the boat for ever and they will not bother to replace it. I for one will be looking with interest.
What amazes me is that none of the other Japanese manufacturers has tried to beat the Yaesu FT817. ICOM?