Meta’s Twitter alternative promises that it will work with decentralized platforms, giving you greater control of your data. You can hold the company to that—if you don't sign up.
This has been my slightly controversial take as well.
Brands and governments can create their Thread accounts (they were never going to join Mastadon), users can use Mastadon to access those if they want, while keeping away from Meta.
It could be what's needed to bring Mastadon into the main stream.