It's probably true: Fujifilm might've given up on the X Pro 4, considering what we're finding with their current lineup. But could that mean that Leica might come in to save the day? Leica's prices have held steady as the rest of the camera market's prices have risen.
If Fujifilm users across the board received as few firmware updates as the Fujifilm X Pro 3, I think they'd all leave the camera system. With the new Fujifilm XT5 out of the bag, it's time for a significant update to the Fujifilm X Pro 3.
Now that the Fujifilm XH2 is out and about, the next big thing to be reported to get an update is the Fujifilm XT4. This, as a Fujifilm X Pro 3 user, is fascinating. Of course, as a customer for over 10 years I feel betrayed a bit.