I thought that I read on another HTF thread a few years back that The Invisible Man series Blu-ray was also deriveded from SD transfers. Perhaps I'm thinking of a different short lived mid '70s TV series?
CHEERS! :)
Considering we have a few Sony Complete Series DVD sets that employ the disc spindle set up, stacks of two Blu-rays (Which are less likely to become scratched than DVDs!) doesn't seem like a deal breaker. Obviously, one's mileage may vary.
CHEERS! :)