The way that BD-J works prevents it from working reliably even on the highest end systems like the several thousand dollar Magnetars. It just can't be helped.

If you get a nice Magnetar, or even a decent Panasonic it will do it's best and work on DVD and non BD-J blu-ray, but it can't control what the vendor did and it will still fail for those Java discs.

Letting whatever dummy made the disk control the hardware to the extent that BD-J does is just ludicrous.