& DVD can reach 16x/CD can reach 40x no problem?
I genuinely think the drive has aged and maybe restricted itself in terms of read speed. I dunno if the BDR drives are anything like the DVR drives, but I think Pioneer tends to set a drive to immediately rev to the highest speed possible when it detects a disc. It might be at that point that it does a quick test, determines it can no longer read at max speed, and applies a limit to itself.
Or maybe it's a fluke, where all your BD media (including pressed discs) are of questionable quality suddenly.
Or maybe it's just a bad drive/bad luck. I wish there was a way to check the health of the BD laser diode on these drives, but I don't know of a way to do so.