I've lost access to plenty of Claude stuff without canceling anything. I am careful not to leave anything important in there and back up regularly.

It's funny because sometimes it will remember stuff that is lost and not be able to reference stuff that is clearly visible.

One area where I find ChatGPT superior (and this is just my own experience) is not losing things and also respecting project boundaries. Claude projects just seem to be a way to lose things faster, the model seems to be entirely unaware of projects as a concept.