Yesterday, my ST hub suddenly and without warning lost all devices. While I am working with ST Support, I checked my WebCore and all the pistons I had written were still listed (I had paused them a while back while I wrote routines). All of them did have auto backup turned on.
Since I am now more than a little frustrated at the situation ST left me in, I am looking at going to Hubitat and wanted to look at my old pistons but they would not come up. It eventually said they were outdated and to log out and log back in. When I did that, they were no longer listed.