Thankfully there are some excellent ways around this. So using a standard Mac all you’re provided with is iCloud and its iTunes Movie store, both of which you coincidentally pay Apple for. There’s an inner irony here, in that the 2015 movie Steve Jobs is available on Blu-ray, and Apple hasn’t come up with a better solution than BD-R for removable bulk storage. This all goes back a dozen years or so, to October 2008, when Steve Jobs decided that Macs wouldn’t support Blu-ray, which he castigated as “a bag of hurt”.
But when I connected my shiny new Pioneer BDR-XD05B portable Blu-ray burner and inserted Spitfire, macOS couldn’t even guess that it is playable. All you should need is that pile of old Blu-ray disks and a Blu-ray player hooked up to your Mac, for its Retina display to be filled with high-definition movies which you’ve already paid for and don’t have to stream.