Emby just felt more polished and focused while Jellyfin felt like it was on the path towards feature bloat. Also, I had more confidence in Emby supporting future devices I might get than Jellyfin.

When it comes to supporting multiple media types (video/audiobooks/music/etc..) I prefer using a seperate solution for each that is focused on that use case instead of an all-in-one solution.

I am using audiobookshelf for audiobooks and podcasts, so I really don't need that from my video solution.

I have configured Emby to keep the metadata in nfo files next to the videos, so I should be able to easily switch to something else if things change in the future.