Originally posted by biz-engineer . . . the more prints I make from the Pentax K-1 the more I think "I should never had purchased my five apsc camera upgrades between 2008 and 2016". I think so because prints from my Pentax K1 D-FA lens kit are so good and so much better than prints from all of my previously owned cameras.
I'm assuming that you mean "better" in terms of technical characteristics such as sharpness, resolution and noise. And of course if those are your personal priorities then it's completely understandable that the K-1 might be the best camera you've ever owned.
But another photographer might say with equal validity: "The more prints I make from the Pentax K10D the more I think I should never had purchased my five apsc camera upgrades between 2008 and 2016." Because all those later cameras had a rendering style in both colour and B&W that the photographer dislikes, and that particular photographer doesn't make huge prints that need a massively high resolution sensor. So, for that photographer, the K10D is still the best camera he's ever owned.
As you say, the big problem for the camera industry is that the technology has matured. It's getting harder and harder to convince people that they need to buy the latest camera on the basis of some huge technical advancement that it offers. It's a corner that the camera industry chosen to back itself into. For twenty years it was easy to market cameras on the basis of: "Look guys! Bigger sensor! More megapixels! Less noise!" and of course that was exactly what all the most vocal early adopters on all the internet forums were demanding. Now though, that's not enough. The technical improvements are becoming so small that it's hard to build a marketing campaign around them any more.
Fortunately, it looks like Pentax has chosen to start basing its brand image on the other side of photography. The side that isn't about megapixels and lines per millimetre. The side of photography that's about colour and light and composition. Pentax has chosen to make the high quality optical viewfinder a major selling point of its latest APS-C, and from the samples I've seen so far it looks like it's put a lot of work into the colour science too (the K-1's colour rendering makes me want to barf). So perhaps now, with Pentax, we'll have two big players in the industry who'll be basing their appeal on photography as an art form rather than as a race for technological bragging rights (Leica is the other one).
Who knows, maybe one day Pentax or some other manufacturer will take the plunge and release a camera with an up-to-date full frame CCD sensor? It'd no doubt have lower resolution and maybe (but not necessarily) worse noise, but I bet it would produce a colour rendering to die for. And it would cause such a kerfuffle in internet land that the marketing campaign for the darn thing would pretty much be a freebie.