@mirage: I don't think the message can be made any more explicit than that, and it isn't worded in any way that might make you think anything is actually going wrong, so I'm genuinely curious what you were thinking might have been going on given the context?
In the unlikely event there would be a chance for something actually going wrong, you'll find ample warning in the FW release thread, e.g.,
https://www.mobileread.com/forums/sh...69&postcount=7 (and, quite likely even before that, because betas).