I mean hosted channels are just custodial wallets, they don’t *need* anything :). Still, I don’t think async payments are *that* required even for non-custodial - they solve an important problem but for apps people use, the on-notification hooks provide relatively good results, and the upgrade path to async means we can improve it as we go.
Discussion
Yeah, if the receiver phone has an internet connection receiving on phoenix works relatively well while the app is in the background. I guess async solves for the cases where the phone is offline for extended periods of time. But since zaps are mostly not mission critical, but tipping for shitposts, it might work fine without async payments.