“This reminds me of the Warp Train in Library of Ruina. It can travel anywhere within 10 minutes, by jumping through another dimension, but in one incident it seems to malfunction, and doesn't arrive at its destination. The passengers are stuck in warp space, and oddly are in a 'stasis', wherein they don't need food or drink, or need to use the bathroom. It turns out they can't die either, as people start trying to commit suicide after being stuck for weeks. As the weeks turn into months, and then years, the passengers resort to brutalizing each other just to feel something, eventually turning into quivering lumps of flesh through their violence. After 2000 years, the train finally arrives at its destination, 10 minutes later in our universe. The company hits a button, and like loading a savestate, the passengers are returned to normal, none the wiser, with no memories of the 2 millenia of hell they just went through.

The train was never malfunctioning. This happens every single time.”

Why is there no feature to save your OS' state across reboots?

Like images or savestates you can load up any time.
Besides the fact dual booting is way more useful this way, you could have huge organized workspaces, leaving your current work open, clicks away.

Even in professional IT this would be a gamechanger.