snaps/flatpak vs appimage

You always compare Snap packages and Flatpaks to AppImages but never mention the big difference between them. Snaps and Flatpaks are sandboxed unlike AppImages, which is the whole point of using Snaps of Flatpaks over AppImages.

(Although since sandboxing doesn't work under X at all, there is no point in using them, other than testing)
- predator8bit