I like that the trailing players strategy (Meta, xAI) is to open source the moat of the leaders. I think we will all benefit from it. and hopefully both the leaders and the trailing players will be much less powerful in the end.
I wonder if that malicious feature was removed from the open release. In addition, if the builds aren't reproducible and people just run the binaries distributed by X instead of building from source, there is no guarantee that they aren't running a version with malware.