If you have Apple users in your household, the current generation of Apple TV 4K 128GB is a solid device that’s going to offer the best integrated experience, along with capability of Thread. If not, it’s probably a bit overpriced compared to the other solutions.
It doesn't offer AVC1 decoding; so if that matters to you, skip it. If it doesn't (and it absolutely doesn't for the vast majority of users) then it's not only best-in-class, it's alone in its class. The nVidia Shield Pro is the only other device with as much power in it and that's been eclipsed by the newest AppleTV iteration. They're really just that good.
You can buy a lifetime license for Infuse. Alternatively the Jellyfin app is available too (as Swiftfin on the Apple TV App Store, but displays as Jellyfin on the Home Screen).
Not sure how but I've missed Swiftfin and was using Infuse on my Apple TV for past few months. Made a quick test and it seems that Swiftfin suffers from the same issue as Plex does - crappy connection makes crappy experience. Don't know how Infuse makes it but with the same network settings movies looks way better.
Can’t say I’ve noticed video differences, but Infuse has had the fewest audio sync issues for me. However the Plex layout simply fits my brain better. Especially the ability to reorder media and use collections, and integrate my OTA antenna.
Is it still true that only the Shield Pro does Atmos for my own media?