Educate us. What makes it less secure?
Telegram allows you to have distinct disappearing settings for each chat/group. Not sure how it works on Signal, but a solution like this could be possible.
[1] https://asahilinux.org/docs/platform/security/ [2] https://support.apple.com/guide/security/hardware-security-o... [3] https://eclecticlight.co/2022/01/04/booting-an-m1-mac-from-h...