Originally posted by agp1337 The feeling was that mirrorless will be dominant, quite soon
That's a popular clickbait topic, not backed up by data. Mirrorless has grown, obviously, its growth has now stabilized more or less. It's an interesting new option in the market.
Originally posted by agp1337 Fed up of tired arms, I have now bought a Fuji xe-3 and three lenses
You are comparing the K-1 with the largest, fastest lenses available for it, with an APS-C mounted with kit lenses...
Your Kp is comparable in size and weight to that Fuji.
Originally posted by agp1337 giving a range of 12-200mm
If range was the only important element in photography, we'd all be using 18-300mm lenses instead of Limited primes.
Originally posted by agp1337 I have carried it, literally, miles, in a small shoulder bag and with no ill effects
I have done the same with the K-1, but YMMV. I maintain that you could write the same comment about the Kp if you had similar lenses.
Originally posted by agp1337 Both look fantastic, the Fuji is possibly more 'lively,'
Fuji produces fine images. While pixel peeping it's a matter of post-processing (or lack thereof) more than anything else.
Originally posted by agp1337 You might guess my conclusion - all of the Pentax gear will be sold! If I was sticking with DSLR I'd stay with Pentax, but i no longer see any great value in the extra weight.
I wish you happiness with the Fuji system.
I do believe you are comparing apples and oranges. The lenses you are comparing are not comparable. The sensors aren't either (at base ISO they are, at high ISO they aren't). It doesn't make much sense to compare a FF DSLR with fast zoom lenses with a mirrorless with kit lenses, look only at the weight and expect the FF to come out ahead.