As mentioned earlier in the thread, newer BD+ discs and Screen Pass discs require the OPD (probably the last couple of years or so)
Those newer BD+ discs are then cached locally (Screen Pass are not)
I'm aware that newer BD+-Discs (or any newer copy-protection) require the OPD.
RedFox is now here with a fully working OPD for all old and future discs, so in a way he went above and beyond that promise.
Wonderful for Redfox
Wonderful for me: I don't have such newer discs. Nor am I buying bluray-discs in the near future. As a former LTL-costumer of SlySoft I don't necessarily need a new Redfox-License.
Maybe some time later - if I buy blurays again, someday...