You're probably right! But they've done the Mira mapletop and the korina one, still 24 frets... then the Mira 245 with P-90s, that's 22 frets but still no wide-fat (which was a surprise).
I just have a feeling that now Joe Knaggs has left PRS they'll start phasing out his designs (unless they're big sellers of course!)
But in any case, the Mira X is interesting because it has different timbers, I have so many mahogany guitars!