Why does Criterion not release 4K blu rays?

[Zepfanman]

Originally Posted by RCRochester

Why start a new thread about this topic in the Movies section, when there's a well established Criterion thread already where this topic has been discussed at length in the past couple of weeks?

I'm guessing OP hadn't seen the "4K Wish Lists" thread, which @dvining also linked to above: https://forum.blu-ray.com/showthread.php?t=314115

Also, to answer OP's question, I remember hearing a podcast where a staff member from Kino or Criterion mentioned that they scan the content in 4K or higher so they can use it in the future. It takes considerably more processing time for Criterion to clean up a 4K file compared to something down-scaled to 2K, if that makes sense. It's faster and more economical to edit the 2K content as opposed to 4K when the majority of Criterion/Kino customers are not demanding 4K UHD discs.