Has anyone found much value in creating personal GPTs, trained on their social media posts, articles, etc.?

Co-Founder at sablier.com, and open-source developer. I have a broad range of interests, including longevity, epistemology, physics, and psychology.

I'm unclear on what the use case would be.

If you have brand big enough to justify it, you are probably pretty particular about what "you" post. 

I wouldn't want anything posting on Warpcast on my behalf without serious editing and review, and at that point, I might as well just post manually. 

Plus, I am creeped out by the idea of setting something like that up, then getting hit by a bus and having it continue posting from beyond the grave and making everyone sad. 😂