The issue with Blu-rays is they are costly to rip. Basically, the only software that let you do it right now is MakeMKV, and it's proprietary. I believe that the VLC team is working on some open-source solutions, but last time I checked, it was only able to read old Blu-ray (which is understandable, they have to care about potential copyright and drm issue, unlike the people behind makemkv).
So if you want to rip recent Blu-ray, you will need to buy makemkv (they do have a 1-month trial tho). But worse, if you want to rip 4k Blu-ray, you will need a specific br-drive that makemkv support (as I understand, they make custom / modified firmware for some drives, allowing to read the protected data). The issue is that there is barely anyone still making br drives and whenever makemkv support one it goes out of stock and/or become extremely expensive on the second hand market.
This is really annoying me because I know this is the end of the physical market for movie. I fully expect Blu-ray to completely die off in a few years. Movie will probably only be available through streaming services, which means it will be harder and harder to get a good quality encoding. With recent codecs (av1, h265, will see how av2 does), the quality that streaming services is okay, but we are far from what a full Blu-ray dump allows today.
MakeMKV has an effectively perpetual free trial right now. It's not like old shareware were you have to pay after a month but rahter that you have to feed it a new free activation key every month and maybe wait a couple of days for one to be posted.
That can change (and the official communication is that its only free while in beta) but my guess is that the free beta is the main thing holding back alternatives. MakeMKV does solid work but it's not rocket science and a lot of parts (like all the complementary LibreDrive / UHD firmware work) doesn't even have a paid license check at all.
> I fully expect Blu-ray to completely die off in a few years.
I don't. It might continue to shrink and thereby get more expensive but the distributor market is still very healthy and has more active competition than movie production itself. The biggest danger is disc production but I don't think its impossible to shift that over to a BD-on-USBFlash or whatever else is convenient if needed.
Maybe, just like Adobe products recently, someone should vibe code an alternative to that blu-ray ripper...maybe even you.