Well yeah, if everything runs unsandboxed as root then there are no privilege escalations!
Less pithy, i seem to recall many issue with programs that relied on suid and permission dropping, which would be the 'oldschool' way of firming up the above.
You're not wrong that complexity has been introduced, and I'm not a a fan of snap either, but ultimately sandboxes (esp backwards compatible ones that don't need source level modifications) are complex.
If you want simple and secure, you're probably looking at OpenBSD and pledge.
Less pithy, i seem to recall many issue with programs that relied on suid and permission dropping, which would be the 'oldschool' way of firming up the above.
You're not wrong that complexity has been introduced, and I'm not a a fan of snap either, but ultimately sandboxes (esp backwards compatible ones that don't need source level modifications) are complex.
If you want simple and secure, you're probably looking at OpenBSD and pledge.