It's also worth noting that not all Bluray players, even with the logo, can play all Blurays. It comes down to which version of the spec they support (and most aren't upgradable). Frankly the whole thing was a bit of a mess, it's not surprising uptake has never been great....
Hm, our Blu-ray player is very old and we've never encountered not being able to play a certain Blu-ray disc.
I know there's Profile 1.0 and Profile 1.1 and Profile 2.0 players. I'm not sure I'd consider that a mess though. I've definitely seen other things a lot more messy.... like e.g. HTML.
Profile 1.1 players of course offered more things than Profile 1.0 players did (like PIP and persistent storage), but I'm fairly sure most disc producers who wish to use these features only does so if Profile 1.1 is detected.
Profile 2.0 players just mean there's network capabilities too. Again, check if available and if not then don't use.
But now you've peaked my curiosity, so I'll probably find out what profiles my test-players are now, and then see if I can find a disc in my collection that won't play on them.
For the development of "8bit Stories" though, I have intentionally been buying older devices to test on, just because I'm a crazy man with a weird hobby. I find it fun to get things running on these old devices.
So I'm fairly sure my project will run on anything out there.