I wouldn’t read anything into their silence. Sequential doesn’t have a team dedicated to each device, they have a talented group of passionate individuals who work on every product they put out. They’ve already mentioned a new product they expected to announce later this year, and are doubtless hard at work on getting it ready for its turn in the spotlight.
... but Sequential has shown, time and again, that they are willing to go back and invest in making the most of the hardware they’ve already shipped, too. Witness the big update for the Pro 2, adding linear FM late in the product’s production lifetime. I expect Sequential has plenty of ideas for where they might take the Prophet X next, too.
As always it’s best to buy an instrument for what it is today. Every day we see a new sample pack from 8Dio, a third party like Goldbaby, or from the community like our own VCO Pack, it just gets better as is starting to feel like it’s hitting its stride. New firmware features would just be icing on the cake.