Finally ordered a K-1ii (bundled with grip) and expect it to arrive by Friday. Will be comparing my experience with
Uncle Vanya's loan at least with regard to the redeployment of classic lenses in their intended fields of view.
Really as soon as Pentax announced there would be a full frame digital body, I knew I wanted one - I just wasn't prepared to shell out. But
ars longa, vita brevis; and the "can afford but don't really need" gap was eventually closed by the knowledge that I'm not making the most of some lovely hunks of glass I've been gathering over the years. Most notably -- FA31, A*85/1.4, SMC50/1.2, A28/2.0; and the more common fare -- FA50/1.4, Vivitar/Cosina 19/3.8, Zenitar fisheye.
The DA*16-50 might get replaced with the DFA24-70 sometime, but there's a rhythm to these things. There will be plenty to experiment with and learn.