I'm not defending them removing the functionality and I agree it was sold with a feature, that should have been supported. I just think we didn't see the Other OS option continue through the generations because the hardware's price point was taken advantage of.
Sony could have imposed a fee to unlock Other OS, but I don't think anyone would have felt better shelling out an additional $400 to use it. Situation becomes then home customer gets no value from it, businesses are no longer incentivized to buy playstations, and Sony has to continue supporting this thing that few people are paying to access.