Signal is designed with the assumption that data is sensitive and you should err on the side of destroying it.
Facebook is designed more as a shared scrapbook, with the assumption that data is precious and you want to share it with your community, and you should err on the side of oversharing so you don't lose any precious moments. Signal is in no way a replacement for Facebook.
It is if Facebook was never a good fit for you in the first place.
> Signal is designed with the assumption that data is sensitive and you should err on the side of destroying it.
That's... Just not true
> Facebook is designed more as a shared scrapbook
Have you used Facebook in the last 5 years? Its nothing like this at all.