> a zillion people may see it as opposed to your mom and best friend who read it on your blog
If you write solely for vanity than this is great, a zillion is better than 10 so you can feel important.
The problem is that Twitter threads are incredibly ephemeral and also written, inherent to the nature of the platform, to be more engaging than informing.
I would rather a few hundred people, or even a few dozen, carefully read and consider what I've written rather than a "zillion" mindlessly click on some basically contently stream of "sounds good" blips.
Of course I've basically left twitter because the ego boost from engagement was not sufficiently worth the pressure the platform puts on your writing to eventually become pure engagement obsessed drivel, devolving ultimately into the infamous "shit post".
I've had plenty of people I really respect I've met on Twitter and they go only one of two paths in the long run: increasingly writing meaningless content for the ego-driven thrill of likes until they become an intellectual parody of themselves or they leave Twitter baring occasional updates.