I realise that. My point is that when the DVD format was ratified, the majority of people in PAL land owned TVs which could not handle NTSC in any shape or form. Therefore, it would have made no sense to make the DVD format NTSC only. However, nowadays anyone buying a Blu-ray in PAL land will own a new TV which is fully capable of handling NTSC, so the actual need for PAL content on Blu-ray is diminished. I'm guessing that the handful of European/Australian BDs containing PAL extras only do so because it was cheap and convenient for the studio to re-use them from the PAL DVD release. There would be no point in converting them to 480i/480p, as they're not catering for the NTSC market.