I will have to tip my hats off to BMD for up'ing on the competition with a 12K UMP BUT …
I don't need a 12K, or even an 8K, and barely use 6K with the Pocket 6K. Everything I shoot has been at 4K ~ 4.6K on the UMP G2 and 4K ~ 5.7K on the P6K. Barely will I deliver in more than 2.8K so there is enough resizing with a 4K capture. Maybe in 3-4 years from now the 8K and 12K will make sense. So, no to this new product. If I ever need to use this camera, I will just rent it for the project. I see this to only be purchased by larger production houses and rental stores... or maybe by individuals who are silly enough to just show off but no sense of what to do with it. Maybe a few will.
The entry presentation was disappointing. BMD has a problem with supporting their existing camera based and users thereof. They like to come up with the latest and greatest which is good, but they leave older (and even not too old) products in the dust. Nothing on the UMP G2, nor the Pocket 4K or 6K. No new firmware. What a joke.
Well, that's it then. I doubt the 12K will have any market success. There's more interesting cameras for the professional masses that's on this forum, and other forums --- the Red Komodo, the E-Cams, Sony, Canon, and of course the BMD Pocket 4/6K and the UMP G2. I'm just worried that folks who are not going to buy into a 12K UMP will also now consider the UMP G2 and the BMPCC4/6K as unsupported by BMD will look into other vendor options and there will be less interest and market share for BMD cameras. I think this is a bad move by BMD, putting all their eggs on one 12K UMP. But it's all said and done.
I'm not buying the 12K at all and will still be shooting with the BMPCC 6K and UMP G2. Unfortunately, I just saw my investments tanks this morning.

URSA Mini Pro 4.6K G2, BMPCC 6K. iMac Pro 27” 5K Retina, 64gb, 1Tb SSD, 12Tb M.2 NVMe TB4 DAS, 36Tb HDD DAS, Vega 56 8gb GPU/ BM Vega 56 8gb eGPU, MacOS Sequoia+DVRS 19.1.4, BM Panel & Speed Editor. Mac Mini M2 Pro 10/16 cores, Sequoia+DVRS 20