Duopolyare in a duopoly like they both are with a highly lucrative rental and camera sales business with cinema cameras which arguably can get a lot more expensive with accessories
You may have placed your finger on it. In the 645 digital format world, we had (past) a duopoly. But now the general consensus is that Hasselblad's H system is dead man walking. With Hasselblad's X system they have a very strong system with only Fujifilm as a direct competitor. Very unlikely they will revive the H system.
With no real competitor or a directly competing product, P1 may not be overly motivated or in a rush bringing out a IQ5.