You actually tricked yourself into believing this isn't all about shutting down competition to American companies or stopping people's (especially young people's) power to disseminate even remotely left leaning views that could gain traction and threaten the oligarchs.
I mean even the politicians who back this bill state as much, so I'm not sure why you think this is about national defense. American citizens are just under as much threat as before, but now they have one less way to express themselves. Ain't that great. /s
This is to me one of the major reasons Twitter discourse is completely ruined and the platform is mostly useless for seeing what people think now.
When the only people who get to be at the top of discussions are people who pay for twitter, the only opinions that get shared are those that are pro Twitter, pro Elon, etc. Because they have a direct stake in the game.
And that's if the accounts posting aren't all bots that pay for a checkmark to boost engagement, which is almost all I see when I occasionally have to check Twitter these days.
So glad more people are leaving it. There's nothing to gain from it anymore.