I just feel they have hit a wall as no other back really lagged this long.
IQ1 USB 3 support took about 1 year. P45+ full 1 hour exposure took about 6 months.
Neither updates to either back had reciplical non regression checking issues. So far the IQ4 has had it on every single firmware update. Just points to either lack of staff or lack of staff focus., or both.
Edit: Point of consideration, Current Live view on IQ4.
From the first day I received my IQ4, I noticed that the 100% view on the IQ4 was nothing similar to the IQ250, 150, 350, 3100. I have at one time used all 4 of these backs. All of them have excellent, what I consider "state of the art" Live view. The image is sharp, has good contrast and it's easy to determine accurate focus at 100% view.
With the IQ4, the 100% view is IMO not anything like previous backs. It lacks contrast, and details, and makes a 100% view more of a guess than knowing for sure the image is in focus. Zoom to 400% to me is worthless in the field, mainly due to the fact you can't see the screen well enough due to glare and other issues. Moving to a HDMI external monitor, also IMO is not much help.
Exposure selections for Live View on the IQ4 have been anything but acceptable, for anyone coming from a IQ1 to IQ3. Exposure simulation, IMO underexposed the image and the Auto feature, works nothing like the 3100, in that the image pulses between over exposed to under exposed for at least 5 to 6 seconds, then seems to settle on a image, which most times seems over exposed to me. Use of the slider, also seems to have no effect, expect to go to either max brightness or totally underexposed.
This is not the way any previous IQ back works, and it's been 12 months, and P1 has really not done anything. If the answer is we did this because of focus peaking, I am not impressed. Focus peaking at 100% is too much, as everything is green, and at 100% attempting to get critical focus in low light is worthless, (as it focus peaking with most cameras), so you need to depend on the 100% view, which used to be the standard the others tried to reach, now, it's much below the curve.
Paul