I’m imagining a software solution using some form of journaling / checkpoints. Instead of overwriting data in-place, send all writes to fresh, unused storage and then “commit” by updating a pointer to avoid write amplification. You’d need a bit of extra machinery to handle reads on the old data. As I understand it, NVMe drives already send all writes to unused space and then update pointers to reclaim old capacity.

We could start with a nice implementation in the OS. Probably with a way for applications to opt in and out. And then optimize over time. Optimizations could include better integration with the way NVMe devices actually work, rather than the way they pretend to work to the rest of your computer.