Just a little list:
- no battery charging without removing the batteries
- no wireless charging (with batteries in the camera, obviously)
- nearly useless wifi speed
- nearly useless wifi functionality (e.g. cannot browse the camera storage over a local network, for drag/drop file transfer; this is done by implementing Samba shares)
A mobile phone can and does do all these things.
All of it is technically doable, some trivially.
DSLR makers seem to think that their customers hold the view that "real men" will take the battery out and put it in a charger, after every job.
I have a K1, a 24-70 f2.8, a Milvus 18mm, a 70-300 Tamron, and love this kit for the quality of the pics, especially with the Milvus. Friends jokingly refer to the camera as a "weapon" and you could certainly use it to crack somebody's skull with it
A Pentax DSLR gets bigger and heavier with every new version (I've had most of them). I carry it only if travelling to a new place and one which is expected to be scenic.