One issue I'm thinking might happen if meta federates is that they will set up a sort of FOMO(fear of missing out) and make it possible for users of threads to talk in fediverse instances, but fediverse instances not able to talk to threads. I'm not sure if this is technically possible as per the activitypub protocol but just a thought I had.
Mac os when u don't pay 99$ a year to apple to sign the app