I have not researched Blu-rays enough before buying my first one. You can't even play one on Windows by default, and VLC and MPC both require following arcane instructions from user forums to make it work. That's the last time I bother. DVDs were the superior format.
I bought the Louis de Funès collection from France because it advertised having English subtitles, and those movies are very difficult to find online and I was worried someday they might disappear completely; but that was a lie too, only one of the 9 movies has English subtitles.
@Gargron Louis de Funès was fun indeed. Your comment made me wish I could watch some of his movies again! Good luck with the Blurays! Best wishes for these holidays!