UHD Capacity Question

[Shane Rollins]

Basically, how much can a UHD disc hold? Preferably in terms of hours.

We know that a BD-50 can hold 8 hours of HD content or 23 hours of SD content, and a BD-25 can hold roughly half of that. How much can a BD-66 and a BD-100 hold? How much 2K content and how much 4K content? How does SDR/HDR/DV etc factor into it, and how much do they reduce the capacity of the disc? (So I guess how much in SDR, how much in HDR, how much in DV, etc?) The answers I find online are either stupid answers ("a BD-100 holds 100 gigs") or they have so much jargon that I can't make sense of it.