Currently, we don't use the new Stocktake feature because of this flaw which affects us.
If the computer crashes, or runs out of battery, or some idiot hits ctrl+w to close the window or something, the stocktake progress is lost and one must start from scratch. It could take hours to complete a stocktake for us. So that's a big problem even though it doesn't happen often.
In addition to taking into account ham-fingered users and crappy warehouse infrastructure, saving the progress of the stocktake every time the input box is filled in would allow us to pause an extensive stocktake overnight and complete in the morning for example. It would greatly improve the flexibility of the feature.