The main selling points of Accrescent are no accounts required, unattended updates without root (on Android 12+), developers always sign their own apps, and the security properties of Accrescent which means even if Accrescent's servers gets compromised, attackers can't do something like replacing an existing app with their own malicious version without access to the signing key used to sign the repository metadata.
Also keep in mind Accrescent is still in early alpha and so it doesn't have all of the features that are planned. If you'd like to see some of the planned features, please take a look at the roadmap at https://github.com/orgs/accrescent/projects/4/views/1