Comment by vinay_ys

Laptops, especially the likes of MacOS with T2 chip in which all I/o goes through T2 can do some clever things. It can essentially turn the underlying NVMe SSD into a battery backed storage. Even if the OS on main CPU crashes and dies, the T2 chip with its own independent OS can ensure SSD does a full flush before the battery runs out of power. Now, I don't know if Apple does this, but I sure hope they do. It would be great if they published the details so that even Linux on MacBook can do this well.