If this is the case, I urge EVERY instance admin across all currently federated apps to blacklist threads.
If threads is allowed to federate with these apps, it will outweigh all contributions to these apps, and when Meta eventually defederates (which they will), the vast majority of the community will be lost.
PLEASE HEED THIS WARNING!
It would still be up to the admins/devs to introduce those features to their respective instances. There is nothing preventing the integration of innovative features whilst still keeping the instances entirely separate.