Originally posted by Rico Kunzite I assure you the glass is half full. They can always fill it at anytime instead Ricoh/Pentax stays behind the curve instead of in front of it.
I own a K-1. I am always waiting for the K-1 to catch up with me due to the UHS-I bus in normal operation. The sensor can not readout faster than the bottle neck UHS-1 bus. All aspects of the K-1 handling from frame rates to responsiveness to lack of 4k video would benefit from UHS-II.
How is 4 cards overkill? If you can fit 4 Micro SD card slots where they have 2 SD card slots how is that over kill? As a field camera 4 slots is a blessing. Now the storage options are that much more advantageous. You could set Video and Photo back up to separate cards. Or each card slot could be set to a different USER set up. Time-lapse etc all benefit from more storage space.
The XQD in the long term is the best option for performance. The entire architecture could be PCI Express.
Ricoh/Pentax should do away with the mechanical shutter as well. One less thing in the way to reduce weight and size.
I also own a K-1, I know firsthand about it's slow buffer clearing.
Lowering the buffer clearing time to 10 seconds or so would be considerable progress. That's doable within UHS-1 specifications. And as I said, there's UHS-II and UHS-III with even higher speeds.
My point? No need to change the card type; increase the write speeds (preferably, with a controller capable of writing to 2 cards at once).
You are mistaken, the sensor readout has nothing to do with the "UHS-1 bus" - sensor readout is from sensor to RAM and not from the sensor to the SD card.
4K is also not possible because the sensor does not support it in the first place. I'm not sure if the PRIME IV processor could encode 4K video (depending which Socionext/Milbeaut processor it actually is); 4K with decent bitrates will likely need UHS-II. But UHS-II by itself solves nothing.
Of course 4 cards are overkill; 2 cards are adding much needed redundancy, another 2... only complexity. Imagine fiddling with 4 minuscule cards after an intense photo session.
XQD would be my favorite if a card format change is needed (not to CF and its bending pins!). But as Pentax doesn't make a speed monster nor a 4k video monster with high bit rates SD would do. 2 XQD cards would make for a larger camera; what I would not want is a SD + XQD combination (like Nikon does).