I wish there was a way to buy movies this way. I know there’s a rental service but you have to use their hardware.
Fortunately, the physical market still allows for such things. That's my current path. Ripping Blu-rays isn't trivial, requiring specific drives and often replacing the firmware, but once you get it set up it's quite convenient.
Naturally though, the digital piracy framework is much easier and more common, but I still like actually owning my movies.