i use it only because it happens to have a convenient 'supply trust chain' on GrapheneOS: (built-in) App Store -> Accrescent[0] -> Molly (seems to ship the 'FOSS' version)

i don't use any of the enhancements, but it does receive notifications over the websocket it keeps open in the background vs only waking up on an FCM push notification like the regular app

i wonder if the supply chain risk of having a second entity (that signs the apks!) involved is really worth it to anyone... hope signal can be published on Accrescent or similar someday :p

[0] https://accrescent.app/