It was just first spotted on the German site, which may have launched first. It's now on all sites. At the bottom of the
English site it says:
And they reiterated that in the Direct, I believe. So key points:
- no save backup/download from Nintendo Online cloud (the game has its own servers it saves to), either to current switch (overwrite save) or to a new switch
- no save file transfer to another switch
- no timeframe announced for release of ability to recover save files from the game's server
- no info on how many times save file recovery can be done or what restrictions will be put in place (you will probably need to call Nintendo support for it if it's limited, and it sounds like they do wanna limit it)
- ability to recover files from the game's server will be limited to Nintendo Online subscribers only (subscription costs money)