It could arrive tomorrow, the day after, next week, the week after. Who cares? my K-3 must be 7yrs old now, in the overall scheme of things, inconsequential. You're all behaving like people from other brands, not the way its done in Pentaxia
It's the unwritten, unspoken part of the brand vision, tease, annoy, surprise, delight the users in every way possible. It's all part of the fun. They're a teeny bit eccentric, it's part of the game.
I for one wouldn't be in the slightest way surprised if the 21 arrived before the 16-50 and for extra giggles, the 16-50 is being held back to launch simultaneously with a new motored 50-135 that is not on any road map.