This idea that the KP has been somewhat of a failure is simply not true. The fact is, there is no such thing as a camera design that pleases everyone and anyone completely. Some people are only comfortable with a camera of a certain size and holding only a certain way, etc. Obviously, those whose shooting encompasses need for dual card slots, and fast FPS burst shooting with a deep buffer, were not targeted with the KP's design. But this is also true of the K-1. Obviously there is a need for a flagship APS-C and a flagship FF design, as the two have distinct advantages, though they overlap. It is very common for a new model's sales to go slowly for a time until the price comes down. Though some are happy to jump on a new model right away, paying the full intro price, most people do not.
To further emphasize the attractiveness of the KP, the remaining stock disappeared in record time after the K-3 III came. This caused the price to increase- something I have never seen happen with an outgoing model, over many decades!!
What is and has been the main trend with the camera market? A big swing to mirrorless, is what. Yeah, there's the "smart" phones, but that kind of general photo taking need has always been there as in compact P/S cameras, which is what the phones actually do replace, not comparable to what mirrorless cameras can offer for serious and challenging photography. One of the major aspects of the KP's design and appeal has been as a DSLR alternative option to upscale APS-C mirrorless offerings. Close in size, with a little more weight due to the OVF, but having a wealth of features and superior control systems. The choice of grip sizes was another factor in its command over those mirrorless models.
---------- Post added 07-05-21 at 04:58 PM ----------
Originally posted by Stefan Jr KP made me stay with Pentax.
No doubt you are not alone. Many would have been otherwise drawn over into the mirrorless options. I have also seen many postings appear over the last 3 years or so expressing great interest in the KP after having shopped the APS-C mirrorless field. The KP has the tiltable rear EVF, which is useful when shooting on tripod from a lower angle to avoid having to bend over, as well as the OVF. It has its many other advantages in a still compact but very well built design.