Quote from Dan at Neural:
According to the quote from Dan (see above), who is a Neural employee, “creating and restoring of backups for users who remain on the older firmware will still be available”. It is the other uses of the Cortex Cloud that will be impacted such as individual preset or capture uploading/downloading - but only if you don’t upgrade to 2.0. I have no idea how the IR uploads to the cloud will be handled for users who don’t upgrade.
So, you should not lose anything regardless of whether you upgrade or not. Always a good plan to have a current backup though, and absolutely essential before doing an upgrade.