How is that part even news? Like, when have AL characters ever not needed updating when options they’re built using receive changes (e.g. when there’s errata)? Granted, this is a bigger set of changes than has previously been seen in 5e, but we’ve had plenty of advance warning, was anyone really not expecting the majority of the PHB to be receiving such updates?
The news here, if there is any, would be that existing material that isn’t being reproduced in the 2024 PHB (which is to say, the handful of Wizard and Cleric subclasses in the 2014 PHB and all playable options outside the PHB) will be playable without needing any changes. And I’d argue that still shouldn’t be surprising, but there still seem to be a lot of people who are convinced the 2024 rules are actually going to be a new edition despite all evidence to the contrary. They’re the only reason this tweet isn’t a complete nothing-burger.