Unlike taxes and death, nothing is a certainty in this world. Your source may have been just creating a hypothetical situation - who knows? Ancestral Quest programmers had a hand in the creation of PAF 4 and anyone who used both of those programs could recognise the similarity. However, with PAF 5, a completely different path was taken. Nothing I have read indicates that there is any move to Legacy taking over. But of course, if that was to happen the preliminary discussions between the FHL and Millenia would not be made public, just as any business deal is only between the parties concerned initially. I feel confident that PAF will be with us for a while yet. Anyway, they could not pick a better program than Legacy, to team up with, though.